get rid of tabs;
authorwenzelm
Wed, 27 Aug 2008 12:00:28 +0200
changeset 28020 1ff5167592ba
parent 28019 359764333bf4
child 28021 32acf3c6cd12
get rid of tabs;
src/Pure/Isar/locale.ML
src/Pure/ProofGeneral/pgip_input.ML
src/Pure/ProofGeneral/pgip_output.ML
src/Pure/ProofGeneral/pgip_tests.ML
src/Pure/ProofGeneral/pgip_types.ML
src/Pure/ProofGeneral/pgml.ML
src/Pure/ProofGeneral/proof_general_emacs.ML
src/Pure/ProofGeneral/proof_general_pgip.ML
--- a/src/Pure/Isar/locale.ML	Wed Aug 27 11:49:50 2008 +0200
+++ b/src/Pure/Isar/locale.ML	Wed Aug 27 12:00:28 2008 +0200
@@ -1595,10 +1595,10 @@
     val id' = prep_id id
     val eqns' = case get_reg id'
       of NONE => eqns
-	| SOME (_, _, eqns') => Termtab.join (fn t => fn (_, e) => e) (eqns, eqns')
+        | SOME (_, _, eqns') => Termtab.join (fn t => fn (_, e) => e) (eqns, eqns')
             handle Termtab.DUP t =>
-	      error ("Conflicting interpreting equations for term " ^
-		quote (Syntax.string_of_term ctxt t))
+              error ("Conflicting interpreting equations for term " ^
+                quote (Syntax.string_of_term ctxt t))
   in ((id', eqns'), eqns') end;
 
 
--- a/src/Pure/ProofGeneral/pgip_input.ML	Wed Aug 27 11:49:50 2008 +0200
+++ b/src/Pure/ProofGeneral/pgip_input.ML	Wed Aug 27 12:00:28 2008 +0200
@@ -30,15 +30,15 @@
     | Restoregoal    of { thmname : string }
     (* context inspection commands *)
     | Askids         of { url: PgipTypes.pgipurl option,
-			  thyname: PgipTypes.objname option,
-			  objtype: PgipTypes.objtype option }
+                          thyname: PgipTypes.objname option,
+                          objtype: PgipTypes.objtype option }
     | Askrefs        of { url: PgipTypes.pgipurl option,
-			  thyname: PgipTypes.objname option,
-			  objtype: PgipTypes.objtype option,
-			  name: PgipTypes.objname option }
+                          thyname: PgipTypes.objname option,
+                          objtype: PgipTypes.objtype option,
+                          name: PgipTypes.objname option }
     | Showid         of { thyname: PgipTypes.objname option, 
-			  objtype: PgipTypes.objtype, 
-			  name: PgipTypes.objname }
+                          objtype: PgipTypes.objtype, 
+                          name: PgipTypes.objname }
     | Askguise       of { }
     | Parsescript    of { text: string, location: PgipTypes.location,
                           systemdata: string option } 
@@ -74,59 +74,59 @@
 (*** PGIP input ***)
 
 datatype pgipinput = 
-	 (* protocol/prover config *)
-	 Askpgip 	of { }
-       | Askpgml 	of { } 
-       | Askconfig	of { }
-       | Askprefs	of { }
-       | Setpref 	of { name:string, prefcategory:string option, value:string }
-       | Getpref 	of { name:string, prefcategory:string option }
+         (* protocol/prover config *)
+         Askpgip        of { }
+       | Askpgml        of { } 
+       | Askconfig      of { }
+       | Askprefs       of { }
+       | Setpref        of { name:string, prefcategory:string option, value:string }
+       | Getpref        of { name:string, prefcategory:string option }
        (* prover control *)
-       | Proverinit 	of { }
-       | Proverexit 	of { }
+       | Proverinit     of { }
+       | Proverexit     of { }
        | Setproverflag  of { flagname:string, value: bool }
        (* improper proof commands: control proof state *)
-       | Dostep		of { text: string }
-       | Undostep	of { times: int }
-       | Redostep	of { }
-       | Abortgoal	of { }
-       | Forget		of { thyname: string option, name: string option, 
-			     objtype: PgipTypes.objtype option }
+       | Dostep         of { text: string }
+       | Undostep       of { times: int }
+       | Redostep       of { }
+       | Abortgoal      of { }
+       | Forget         of { thyname: string option, name: string option, 
+                             objtype: PgipTypes.objtype option }
        | Restoregoal    of { thmname : string }
        (* context inspection commands *)
        | Askids         of { url: PgipTypes.pgipurl option,
-			     thyname: PgipTypes.objname option,
-			     objtype: PgipTypes.objtype option }
+                             thyname: PgipTypes.objname option,
+                             objtype: PgipTypes.objtype option }
        | Askrefs        of { url: PgipTypes.pgipurl option,
-			     thyname: PgipTypes.objname option,
-			     objtype: PgipTypes.objtype option,
-			     name: PgipTypes.objname option }
+                             thyname: PgipTypes.objname option,
+                             objtype: PgipTypes.objtype option,
+                             name: PgipTypes.objname option }
        | Showid         of { thyname: PgipTypes.objname option, 
-			     objtype: PgipTypes.objtype, 
-			     name: PgipTypes.objname }
-       | Askguise	of { }
-       | Parsescript	of { text: string, location: location,
-			     systemdata: string option } 
+                             objtype: PgipTypes.objtype, 
+                             name: PgipTypes.objname }
+       | Askguise       of { }
+       | Parsescript    of { text: string, location: location,
+                             systemdata: string option } 
        | Showproofstate of { }
-       | Showctxt	of { }
+       | Showctxt       of { }
        | Searchtheorems of { arg: string }
        | Setlinewidth   of { width: int }
-       | Viewdoc	of { arg: string }
+       | Viewdoc        of { arg: string }
        (* improper theory-level commands *)
-       | Doitem		of { text: string }
-       | Undoitem	of { }
-       | Redoitem	of { }
-       | Aborttheory	of { }
+       | Doitem         of { text: string }
+       | Undoitem       of { }
+       | Redoitem       of { }
+       | Aborttheory    of { }
        | Retracttheory  of { thyname: string }
-       | Loadfile 	of { url: pgipurl }
-       | Openfile 	of { url: pgipurl }
-       | Closefile	of { }
-       | Abortfile	of { }
+       | Loadfile       of { url: pgipurl }
+       | Openfile       of { url: pgipurl }
+       | Closefile      of { }
+       | Abortfile      of { }
        | Retractfile    of { url: pgipurl }
-       | Changecwd 	of { url: pgipurl }
-       | Systemcmd 	of { arg: string }
+       | Changecwd      of { url: pgipurl }
+       | Systemcmd      of { arg: string }
        (* unofficial escape command for debugging *)
-       | Quitpgip	of { }
+       | Quitpgip       of { }
 
 (* Extracting content from input XML elements to make a PGIPinput *)
 local
@@ -140,12 +140,12 @@
     val value_attr = get_attr "value"
 
     fun objtype_attro attrs = if has_attr "objtype" attrs then
-				  SOME (objtype_of_attrs attrs)
-			      else NONE
+                                  SOME (objtype_of_attrs attrs)
+                              else NONE
 
     fun pgipurl_attro attrs = if has_attr "url" attrs then
-				  SOME (pgipurl_of_attrs attrs)
-			      else NONE
+                                  SOME (pgipurl_of_attrs attrs)
+                              else NONE
 
     val times_attr = read_pgipnat o (get_attr_dflt "times" "1")
     val prefcat_attr = get_attr_opt "prefcategory"
@@ -171,39 +171,39 @@
    (* proverconfig *)
    | "askprefs"       => Askprefs { }
    | "getpref"        => Getpref { name = name_attr attrs, 
-				   prefcategory = prefcat_attr attrs }
+                                   prefcategory = prefcat_attr attrs }
    | "setpref"        => Setpref { name = name_attr attrs, 
-				   prefcategory = prefcat_attr attrs,
-				   value = xmltext data }
+                                   prefcategory = prefcat_attr attrs,
+                                   value = xmltext data }
    (* provercontrol *)
    | "proverinit"     => Proverinit { }
    | "proverexit"     => Proverexit { }
    | "setproverflag"  => Setproverflag { flagname = flagname_attr attrs,
-					 value = read_pgipbool (value_attr attrs) }
+                                         value = read_pgipbool (value_attr attrs) }
    (* improperproofcmd: improper commands not in script *)
    | "dostep"         => Dostep    { text = xmltext data }
    | "undostep"       => Undostep  { times = times_attr attrs }
    | "redostep"       => Redostep  { } 
    | "abortgoal"      => Abortgoal { }
    | "forget"         => Forget { thyname = thyname_attro attrs, 
-				  name = name_attro attrs,
-				  objtype = objtype_attro attrs }
+                                  name = name_attro attrs,
+                                  objtype = objtype_attro attrs }
    | "restoregoal"    => Restoregoal { thmname = thmname_attr attrs}
    (* proofctxt: improper commands *)
    | "askids"         => Askids { url = pgipurl_attro attrs,
-				  thyname = thyname_attro attrs, 
-				  objtype = objtype_attro attrs }
+                                  thyname = thyname_attro attrs, 
+                                  objtype = objtype_attro attrs }
    | "askrefs"        => Askrefs { url = pgipurl_attro attrs,
-				   thyname = thyname_attro attrs, 
-				   objtype = objtype_attro attrs,
-				   name = name_attro attrs }
+                                   thyname = thyname_attro attrs, 
+                                   objtype = objtype_attro attrs,
+                                   name = name_attro attrs }
    | "showid"         => Showid { thyname = thyname_attro attrs,
-				  objtype = objtype_of_attrs attrs,
-				  name = name_attr attrs }
+                                  objtype = objtype_of_attrs attrs,
+                                  name = name_attr attrs }
    | "askguise"       => Askguise { }
    | "parsescript"    => Parsescript { text = (xmltext data),
-				       systemdata = get_attr_opt "systemdata" attrs,
-				       location = location_of_attrs attrs }
+                                       systemdata = get_attr_opt "systemdata" attrs,
+                                       location = location_of_attrs attrs }
    | "showproofstate" => Showproofstate { }
    | "showctxt"       => Showctxt { }
    | "searchtheorems" => Searchtheorems { arg = xmltext data }
@@ -223,17 +223,17 @@
    | "changecwd"      => Changecwd { url = pgipurl_of_attrs attrs }
    | "systemcmd"      => Systemcmd { arg = xmltext data }
    (* unofficial command for debugging *)
-   | "quitpgip"	=> Quitpgip { }
+   | "quitpgip" => Quitpgip { }
 
    (* We allow sending proper document markup too; we map it back to dostep   *)
    (* and strip out metainfo elements. Markup correctness isn't checked: this *)
    (* is a compatibility measure to make it easy for interfaces.              *)
    | x => if (x mem PgipMarkup.doc_markup_elements) then
-	      if (x mem PgipMarkup.doc_markup_elements_ignored) then
-		  raise NoAction
-	      else 
-		  Dostep { text = xmltext data } (* could separate out Doitem too *)
-	  else raise Unknown) 
+              if (x mem PgipMarkup.doc_markup_elements_ignored) then
+                  raise NoAction
+              else 
+                  Dostep { text = xmltext data } (* could separate out Doitem too *)
+          else raise Unknown) 
     handle Unknown => NONE | NoAction => NONE
 end
 
--- a/src/Pure/ProofGeneral/pgip_output.ML	Wed Aug 27 11:49:50 2008 +0200
+++ b/src/Pure/ProofGeneral/pgip_output.ML	Wed Aug 27 12:00:28 2008 +0200
@@ -32,21 +32,21 @@
                                prefs: PgipTypes.preference list }
     | Prefval             of { name: string, value: string }
     | Setrefs             of { url: PgipTypes.pgipurl option,
-			       thyname: PgipTypes.objname option,
-			       objtype: PgipTypes.objtype option,
-			       name: PgipTypes.objname option,
-			       idtables: PgipTypes.idtable list,
-			       fileurls : PgipTypes.pgipurl list }
+                               thyname: PgipTypes.objname option,
+                               objtype: PgipTypes.objtype option,
+                               name: PgipTypes.objname option,
+                               idtables: PgipTypes.idtable list,
+                               fileurls : PgipTypes.pgipurl list }
     | Idvalue             of { thyname: PgipTypes.objname option,
-			       objtype: PgipTypes.objtype, 
-			       name: PgipTypes.objname, 
-			       text: XML.tree list }
+                               objtype: PgipTypes.objtype, 
+                               name: PgipTypes.objname, 
+                               text: XML.tree list }
     | Informguise         of { file : PgipTypes.pgipurl option,  
                                theory: PgipTypes.objname option, 
                                theorem: PgipTypes.objname option, 
                                proofpos: int option }
     | Parseresult         of { attrs: XML.attributes, doc:PgipMarkup.pgipdocument, 
-			       errs: XML.tree list } (* errs to become PGML *)
+                               errs: XML.tree list } (* errs to become PGML *)
     | Usespgip            of { version: string, 
                                pgipelems: (string * bool * string list) list }
     | Usespgml            of { version: string }
@@ -67,10 +67,10 @@
 open PgipTypes
 
 datatype pgipoutput = 
-	 Normalresponse      of { content: XML.tree list }
+         Normalresponse      of { content: XML.tree list }
        | Errorresponse       of { fatality: fatality, 
                                   location: location option, 
-				  content: XML.tree list }
+                                  content: XML.tree list }
        | Informfileloaded    of { url: Path.T, completed: bool }
        | Informfileoutdated  of { url: Path.T, completed: bool }
        | Informfileretracted of { url: Path.T, completed: bool }
@@ -84,21 +84,21 @@
        | Hasprefs            of { prefcategory: string option, prefs: preference list }
        | Prefval             of { name: string, value: string }
        | Idvalue             of { thyname: PgipTypes.objname option,
-				  objtype: PgipTypes.objtype, 
-				  name: PgipTypes.objname, 
-				  text: XML.tree list }
+                                  objtype: PgipTypes.objtype, 
+                                  name: PgipTypes.objname, 
+                                  text: XML.tree list }
        | Setrefs             of { url: PgipTypes.pgipurl option,
-				  thyname: PgipTypes.objname option,
-				  objtype: PgipTypes.objtype option,
-				  name: PgipTypes.objname option,
-				  idtables: PgipTypes.idtable list,
-				  fileurls : PgipTypes.pgipurl list }
+                                  thyname: PgipTypes.objname option,
+                                  objtype: PgipTypes.objtype option,
+                                  name: PgipTypes.objname option,
+                                  idtables: PgipTypes.idtable list,
+                                  fileurls : PgipTypes.pgipurl list }
        | Informguise         of { file : PgipTypes.pgipurl option,  
-				  theory: PgipTypes.objname option, 
-				  theorem: PgipTypes.objname option, 
-				  proofpos: int option }
+                                  theory: PgipTypes.objname option, 
+                                  theorem: PgipTypes.objname option, 
+                                  proofpos: int option }
        | Parseresult         of { attrs: XML.attributes, doc: PgipMarkup.pgipdocument,
-				  errs: XML.tree list } (* errs to become PGML *)
+                                  errs: XML.tree list } (* errs to become PGML *)
        | Usespgip            of { version: string, 
                                   pgipelems: (string * bool * string list) list }
        | Usespgml            of { version: string }
@@ -119,7 +119,7 @@
         val content = #content vs
     in
         XML.Elem ("normalresponse", 
-		  [],
+                  [],
                   content)
     end
 
@@ -141,9 +141,9 @@
         val completed = #completed vs
     in
         XML.Elem ("informfileloaded", 
-		  attrs_of_pgipurl url @ 
-		  (attr "completed" (PgipTypes.bool_to_pgstring completed)),
-		  [])
+                  attrs_of_pgipurl url @ 
+                  (attr "completed" (PgipTypes.bool_to_pgstring completed)),
+                  [])
     end
 
 fun informfileoutdated (Informfileoutdated vs) =
@@ -152,9 +152,9 @@
         val completed = #completed vs
     in
         XML.Elem ("informfileoutdated", 
-		  attrs_of_pgipurl url @ 
-		  (attr "completed" (PgipTypes.bool_to_pgstring completed)),
-		  [])
+                  attrs_of_pgipurl url @ 
+                  (attr "completed" (PgipTypes.bool_to_pgstring completed)),
+                  [])
     end
 
 fun informfileretracted (Informfileretracted vs) =
@@ -163,9 +163,9 @@
         val completed = #completed vs
     in
         XML.Elem ("informfileretracted", 
-		  attrs_of_pgipurl url @ 
-		  (attr "completed" (PgipTypes.bool_to_pgstring completed)),
-		  [])
+                  attrs_of_pgipurl url @ 
+                  (attr "completed" (PgipTypes.bool_to_pgstring completed)),
+                  [])
     end
 
 fun metainforesponse (Metainforesponse vs) =
@@ -211,21 +211,21 @@
 
 fun setrefs (Setrefs vs) =
     let
-	val url = #url vs
-	val thyname = #thyname vs
-	val objtype = #objtype vs
-	val name = #name vs
+        val url = #url vs
+        val thyname = #thyname vs
+        val objtype = #objtype vs
+        val name = #name vs
         val idtables = #idtables vs
         val fileurls = #fileurls vs
-	fun fileurl_to_xml url = XML.Elem ("fileurl", attrs_of_pgipurl url, [])
+        fun fileurl_to_xml url = XML.Elem ("fileurl", attrs_of_pgipurl url, [])
     in
         XML.Elem ("setrefs",
-		  (Option.getOpt (Option.map attrs_of_pgipurl url,[])) @ 
-		  (Option.getOpt (Option.map attrs_of_objtype objtype,[])) @
-		  (opt_attr "thyname" thyname) @
-		  (opt_attr "name" name),
-		  (map idtable_to_xml idtables) @ 
-		  (map fileurl_to_xml fileurls))
+                  (Option.getOpt (Option.map attrs_of_pgipurl url,[])) @ 
+                  (Option.getOpt (Option.map attrs_of_objtype objtype,[])) @
+                  (opt_attr "thyname" thyname) @
+                  (opt_attr "name" name),
+                  (map idtable_to_xml idtables) @ 
+                  (map fileurl_to_xml fileurls))
     end
 
 fun addids (Addids vs) =
@@ -260,16 +260,16 @@
 
 fun idvalue (Idvalue vs) =
     let 
-	val objtype_attrs = attrs_of_objtype (#objtype vs)
-	val thyname = #thyname vs
+        val objtype_attrs = attrs_of_objtype (#objtype vs)
+        val thyname = #thyname vs
         val name = #name vs
         val text = #text vs
     in
         XML.Elem("idvalue", 
-		 objtype_attrs @
-		 (opt_attr "thyname" thyname) @
-		 (attr "name" name),
-		 text)
+                 objtype_attrs @
+                 (opt_attr "thyname" thyname) @
+                 (attr "name" name),
+                 text)
     end
 
 fun informguise (Informguise vs) =
@@ -295,7 +295,7 @@
         val attrs = #attrs vs
         val doc = #doc vs
         val errs = #errs vs
-	val xmldoc = PgipMarkup.output_doc doc
+        val xmldoc = PgipMarkup.output_doc doc
     in 
         XML.Elem("parseresult", attrs, errs @ xmldoc)
     end
--- a/src/Pure/ProofGeneral/pgip_tests.ML	Wed Aug 27 11:49:50 2008 +0200
+++ b/src/Pure/ProofGeneral/pgip_tests.ML	Wed Aug 27 12:00:28 2008 +0200
@@ -12,7 +12,7 @@
 fun asseq_p toS a b =
     if a=b then ()
     else error("PGIP test: expected these two values to be equal:\n" ^
-	       (toS a) ^"\n and: \n" ^ (toS b))
+               (toS a) ^"\n and: \n" ^ (toS b))
 
 val asseqx = asseq_p XML.string_of
 val asseqs = asseq_p I
@@ -40,18 +40,18 @@
 
 local
     val choices = Pgipchoice [Pgipdtype (NONE,Pgipbool), Pgipdtype (NONE,Pgipnat), 
-			      Pgipdtype (NONE,Pgipnull), Pgipdtype (NONE,Pgipconst "foo")]
+                              Pgipdtype (NONE,Pgipnull), Pgipdtype (NONE,Pgipconst "foo")]
 in
 val _ = asseqs (pgval_to_string (read_pgval choices "45")) "45";
 val _ = asseqs (pgval_to_string (read_pgval choices "foo")) "foo";
 val _ = asseqs (pgval_to_string (read_pgval choices "true")) "true";
 val _ = asseqs (pgval_to_string (read_pgval choices "")) "";
 val _ = (asseqs (pgval_to_string (read_pgval choices "-37")) "-37"; 
-	 error "pgip_tests: should fail") handle PGIP _ => ()
+         error "pgip_tests: should fail") handle PGIP _ => ()
 end
 
 val _ = asseqx (haspref {name="provewithgusto",descr=SOME "use energetic proofs",
-		 default=SOME "true", pgiptype=Pgipbool})
+                 default=SOME "true", pgiptype=Pgipbool})
        (XML.parse "<haspref name='provewithgusto' descr='use energetic proofs' default='true'><pgipbool/></haspref>");
 end
 
@@ -60,8 +60,8 @@
 local
 
 fun e str = case XML.parse str of 
-		(XML.Elem args) => args
-	      | _ => error("Expected to get an XML Element")
+                (XML.Elem args) => args
+              | _ => error("Expected to get an XML Element")
 
 open PgipInput;
 open PgipTypes;
@@ -83,7 +83,7 @@
 val _ = asseqi "<stopquiet/>" (SOME (Stopquiet()));
 *)
 val _ = asseqi "<askrefs thyname='foo' objtype='theory'/>" (SOME (Askrefs {url=NONE, thyname=SOME "foo",
-									  objtype=SOME ObjTheory,name=NONE}));
+                                                                          objtype=SOME ObjTheory,name=NONE}));
 val _ = asseqi "<otherelt/>" NONE;
 
 end
--- a/src/Pure/ProofGeneral/pgip_types.ML	Wed Aug 27 11:49:50 2008 +0200
+++ b/src/Pure/ProofGeneral/pgip_types.ML	Wed Aug 27 12:00:28 2008 +0200
@@ -11,7 +11,7 @@
     (* Object types: the types of values which can be manipulated externally.
        Ideally a list of other types would be configured as a parameter. *)
     datatype objtype = ObjFile | ObjTheory | ObjTheorem | ObjComment  
-		     | ObjTerm | ObjType | ObjOther of string
+                     | ObjTerm | ObjType | ObjOther of string
   
     (* Names for values of objtypes (i.e. prover identifiers). Could be a parameter.
        Names for ObjFiles are URIs. *)
@@ -24,7 +24,7 @@
     (* Types and values (used for preferences and dialogs) *)
 
     datatype pgiptype = Pgipnull | Pgipbool | Pgipint of int option * int option | Pgipnat
-		      | Pgipstring | Pgipconst of string | Pgipchoice of pgipdtype list
+                      | Pgipstring | Pgipconst of string | Pgipchoice of pgipdtype list
 
     and pgipdtype = Pgipdtype of string option * pgiptype  (* type with opt. description *)
 
@@ -44,17 +44,17 @@
 
     (* File location *)
     type location = { descr: string option,
-		      url: pgipurl option,
-		      line: int option,
-		      column: int option,
-		      char: int option,
-		      length: int option }
+                      url: pgipurl option,
+                      line: int option,
+                      column: int option,
+                      char: int option,
+                      length: int option }
 
     (* Prover preference *)   
     type preference = { name: string,
-			descr: string option,
-			default: string option,
-			pgiptype: pgiptype }
+                        descr: string option,
+                        default: string option,
+                        pgiptype: pgiptype }
 end
 
 signature PGIPTYPES_OPNS = 
@@ -64,21 +64,21 @@
     (* Object types *)
     val name_of_objtype  : objtype -> string
     val attrs_of_objtype : objtype -> XML.attributes
-    val objtype_of_attrs : XML.attributes -> objtype		        (* raises PGIP *)
+    val objtype_of_attrs : XML.attributes -> objtype                    (* raises PGIP *)
     val idtable_to_xml   : idtable -> XML.tree
 
     (* Values as XML strings *)
-    val read_pgipint	   : (int option * int option) -> string -> int (* raises PGIP *)
-    val read_pgipnat	   : string -> int			        (* raises PGIP *)
-    val read_pgipbool	   : string -> bool			        (* raises PGIP *)
-    val read_pgipstring	   : string -> string			        (* raises PGIP *)
-    val int_to_pgstring	   : int -> string
+    val read_pgipint       : (int option * int option) -> string -> int (* raises PGIP *)
+    val read_pgipnat       : string -> int                              (* raises PGIP *)
+    val read_pgipbool      : string -> bool                             (* raises PGIP *)
+    val read_pgipstring    : string -> string                           (* raises PGIP *)
+    val int_to_pgstring    : int -> string
     val bool_to_pgstring   : bool -> string
     val string_to_pgstring : string -> string
 
     (* PGIP datatypes *)
     val pgiptype_to_xml   : pgiptype -> XML.tree
-    val read_pgval        : pgiptype -> string -> pgipval	       (* raises PGIP *)
+    val read_pgval        : pgiptype -> string -> pgipval              (* raises PGIP *)
     val pgval_to_string   : pgipval -> string
 
     val attrs_of_displayarea : displayarea -> XML.attributes
@@ -88,8 +88,8 @@
 
     val haspref : preference -> XML.tree
 
-    val pgipurl_of_url : Url.T -> pgipurl	       (* raises PGIP *)
-    val pgipurl_of_string : string -> pgipurl	       (* raises PGIP *)
+    val pgipurl_of_url : Url.T -> pgipurl              (* raises PGIP *)
+    val pgipurl_of_string : string -> pgipurl          (* raises PGIP *)
     val pgipurl_of_path : Path.T -> pgipurl
     val path_of_pgipurl : pgipurl -> Path.T
     val string_of_pgipurl : pgipurl -> string
@@ -98,7 +98,7 @@
 
     (* XML utils, only for PGIP code *)
     val has_attr       : string -> XML.attributes -> bool
-    val attr	       : string -> string -> XML.attributes
+    val attr           : string -> string -> XML.attributes
     val opt_attr       : string -> string option -> XML.attributes
     val opt_attr_map   : ('a -> string) -> string -> 'a option -> XML.attributes
     val get_attr       : string -> XML.attributes -> string           (* raises PGIP *)
@@ -137,11 +137,11 @@
 (** Objtypes **)
 
 datatype objtype = ObjFile | ObjTheory | ObjTheorem | ObjComment  
-		 | ObjTerm | ObjType | ObjOther of string
+                 | ObjTerm | ObjType | ObjOther of string
 
 fun name_of_objtype obj = 
     case obj of 
-	ObjFile    => "file"
+        ObjFile    => "file"
       | ObjTheory  => "theory"
       | ObjTheorem => "theorem"
       | ObjComment => "comment"
@@ -183,7 +183,7 @@
 
 fun read_pgipbool s =
     (case s of 
-	 "false" => false 
+         "false" => false 
        | "true" => true 
        | _ => raise PGIP ("Invalid boolean value: " ^ quote s))
 
@@ -195,21 +195,21 @@
 in
 fun read_pgipint range s =
     (case Int.fromString s of 
-	 SOME i => if int_in_range range i then i
-		   else raise PGIP ("Out of range integer value: " ^ quote s)
+         SOME i => if int_in_range range i then i
+                   else raise PGIP ("Out of range integer value: " ^ quote s)
        | NONE => raise PGIP ("Invalid integer value: " ^ quote s))
 end;
 
 fun read_pgipnat s =
     (case Int.fromString s of 
-	 SOME i => if i >= 0 then i
+         SOME i => if i >= 0 then i
                    else raise PGIP ("Invalid natural number: " ^ quote s)
        | NONE => raise PGIP ("Invalid natural number: " ^ quote s))
 
 (* NB: we can maybe do without xml decode/encode here. *)
 fun read_pgipstring s =  (* non-empty strings, XML escapes decoded *)
     (case XML.parse_string s of
-	 SOME s => s
+         SOME s => s
        | NONE => raise PGIP ("Expected a non-empty string: " ^ quote s))
     handle _ => raise PGIP ("Invalid XML string syntax: " ^ quote s)
 
@@ -237,53 +237,53 @@
 
 
 datatype pgiptype = 
-	 Pgipnull			     (* unit type: unique element is empty string *)
-       | Pgipbool			     (* booleans: "true" or "false" *)
+         Pgipnull                            (* unit type: unique element is empty string *)
+       | Pgipbool                            (* booleans: "true" or "false" *)
        | Pgipint of int option * int option  (* ranged integers, should be XSD canonical *)
-       | Pgipnat			     (* naturals: non-negative integers (convenience) *)
-       | Pgipstring			     (* non-empty strings *)
-       | Pgipconst of string		     (* singleton type *)
-       | Pgipchoice of pgipdtype list	     (* union type *)
+       | Pgipnat                             (* naturals: non-negative integers (convenience) *)
+       | Pgipstring                          (* non-empty strings *)
+       | Pgipconst of string                 (* singleton type *)
+       | Pgipchoice of pgipdtype list        (* union type *)
 
 (* Compared with the PGIP schema, we push descriptions of types inside choices. *)
 
 and pgipdtype = Pgipdtype of string option * pgiptype
 
 datatype pgipuval = Pgvalnull | Pgvalbool of bool | Pgvalint of int | Pgvalnat of int 
-		  | Pgvalstring of string | Pgvalconst of string
+                  | Pgvalstring of string | Pgvalconst of string
 
-type pgipval = pgiptype * pgipuval	(* type-safe values *)
+type pgipval = pgiptype * pgipuval      (* type-safe values *)
 
 fun pgipdtype_to_xml (desco,ty) = 
     let
-	val desc_attr = opt_attr "descr" desco
+        val desc_attr = opt_attr "descr" desco
 
-	val elt = case ty of
-		      Pgipnull => "pgipnull"
-		    | Pgipbool => "pgipbool"
-		    | Pgipint _ => "pgipint"
-		    | Pgipnat => "pgipint"
-		    | Pgipstring => "pgipstring"
-		    | Pgipconst _ => "pgipconst"
-		    | Pgipchoice _ => "pgipchoice"
+        val elt = case ty of
+                      Pgipnull => "pgipnull"
+                    | Pgipbool => "pgipbool"
+                    | Pgipint _ => "pgipint"
+                    | Pgipnat => "pgipint"
+                    | Pgipstring => "pgipstring"
+                    | Pgipconst _ => "pgipconst"
+                    | Pgipchoice _ => "pgipchoice"
 
-	fun range_attr r v = attr r (int_to_pgstring v)
+        fun range_attr r v = attr r (int_to_pgstring v)
 
-	val attrs = case ty of 
-			Pgipint (SOME min,SOME max) => (range_attr "min" min)@(range_attr "max" max)
-		      | Pgipint (SOME min,NONE) => (range_attr "min" min)
-		      | Pgipint (NONE,SOME max) => (range_attr "max" max)
-		      | Pgipnat => (range_attr "min" 0)
-		      | Pgipconst nm => attr "name" nm
-		      | _ => []
+        val attrs = case ty of 
+                        Pgipint (SOME min,SOME max) => (range_attr "min" min)@(range_attr "max" max)
+                      | Pgipint (SOME min,NONE) => (range_attr "min" min)
+                      | Pgipint (NONE,SOME max) => (range_attr "max" max)
+                      | Pgipnat => (range_attr "min" 0)
+                      | Pgipconst nm => attr "name" nm
+                      | _ => []
 
-	fun destpgipdtype (Pgipdtype x) = x
+        fun destpgipdtype (Pgipdtype x) = x
 
-	val typargs = case ty of
-			  Pgipchoice ds => map destpgipdtype ds
-			| _ => []
+        val typargs = case ty of
+                          Pgipchoice ds => map destpgipdtype ds
+                        | _ => []
     in 
-	XML.Elem (elt, (desc_attr @ attrs), (map pgipdtype_to_xml typargs))
+        XML.Elem (elt, (desc_attr @ attrs), (map pgipdtype_to_xml typargs))
     end
 
 val pgiptype_to_xml = pgipdtype_to_xml o pair NONE
@@ -302,18 +302,18 @@
     else raise PGIP ("Expecting non-empty string, empty string illegal.")
   | read_pguval (Pgipchoice tydescs) s = 
     let 
-	(* Union type: match first in list *)
-	fun getty (Pgipdtype(_, ty)) = ty
-	val uval = get_first 
-		       (fn ty => SOME (read_pguval ty s) handle PGIP _ => NONE)
-		       (map getty tydescs)
+        (* Union type: match first in list *)
+        fun getty (Pgipdtype(_, ty)) = ty
+        val uval = get_first 
+                       (fn ty => SOME (read_pguval ty s) handle PGIP _ => NONE)
+                       (map getty tydescs)
     in
-	case uval of SOME pgv => pgv | NONE => raise PGIP ("Can't match string: "^quote s^
-							   " against any allowed types.")
+        case uval of SOME pgv => pgv | NONE => raise PGIP ("Can't match string: "^quote s^
+                                                           " against any allowed types.")
     end
 
 fun read_pgval ty s = (ty, read_pguval ty s)
-	    
+            
 fun pgval_to_string (_, Pgvalnull) = ""
   | pgval_to_string (_, Pgvalbool b) = bool_to_pgstring b
   | pgval_to_string (_, Pgvalnat n) = int_to_pgstring n
@@ -329,11 +329,11 @@
 datatype fatality = Info | Warning | Nonfatal | Fatal | Panic | Log | Debug
 
 type location = { descr: string option,
-		  url: pgipurl option,
-		  line: int option,
-		  column: int option,
-		  char: int option,
-		  length: int option }
+                  url: pgipurl option,
+                  line: int option,
+                  column: int option,
+                  char: int option,
+                  length: int option }
 
 
 
@@ -341,10 +341,10 @@
 
 
 fun pgipurl_of_string url = (* only handle file:/// or file://localhost/ *)
-	case Url.explode url of
+        case Url.explode url of
             (Url.File path) => path
-	  | _ => raise PGIP ("Cannot access non-local URL " ^ quote url)
-		       
+          | _ => raise PGIP ("Cannot access non-local URL " ^ quote url)
+                       
 fun pgipurl_of_path p = p
 
 fun path_of_pgipurl p = p  (* potentially raises PGIP, but not with this implementation *)
@@ -385,51 +385,51 @@
 
   fun attrs_of_location ({ descr, url, line, column, char, length }:location) =
       let 
-	  val descr = opt_attr "location_descr" descr
-	  val url = opt_attr_map attrval_of_pgipurl "location_url" url
-	  val line = opt_attr_map int_to_pgstring "locationline" line
-	  val column = opt_attr_map int_to_pgstring "locationcolumn"  column
-	  val char = opt_attr_map int_to_pgstring "locationcharacter" char
-	  val length = opt_attr_map int_to_pgstring "locationlength" length
+          val descr = opt_attr "location_descr" descr
+          val url = opt_attr_map attrval_of_pgipurl "location_url" url
+          val line = opt_attr_map int_to_pgstring "locationline" line
+          val column = opt_attr_map int_to_pgstring "locationcolumn"  column
+          val char = opt_attr_map int_to_pgstring "locationcharacter" char
+          val length = opt_attr_map int_to_pgstring "locationlength" length
       in 
-	  descr @ url @ line @ column @ char @ length
+          descr @ url @ line @ column @ char @ length
       end
 
     fun pgipint_of_string err s = 
-	case Int.fromString s of 
-	    SOME i => i
-	  | NONE => raise PGIP ("Type error in " ^ quote err ^ ": expected integer.")
+        case Int.fromString s of 
+            SOME i => i
+          | NONE => raise PGIP ("Type error in " ^ quote err ^ ": expected integer.")
 
   fun location_of_attrs attrs = 
       let
-	  val descr = get_attr_opt "location_descr" attrs
-	  val url = Option.map  pgipurl_of_string (get_attr_opt "location_url" attrs)
-	  val line = Option.map (pgipint_of_string "location element line attribute")
-				(get_attr_opt "locationline" attrs)
-	  val column = Option.map (pgipint_of_string "location element column attribute")
-				  (get_attr_opt "locationcolumn" attrs)
-	  val char = Option.map (pgipint_of_string "location element char attribute")
-				(get_attr_opt "locationcharacter" attrs)
-	  val length = Option.map (pgipint_of_string "location element length attribute")
-				  (get_attr_opt "locationlength" attrs)
+          val descr = get_attr_opt "location_descr" attrs
+          val url = Option.map  pgipurl_of_string (get_attr_opt "location_url" attrs)
+          val line = Option.map (pgipint_of_string "location element line attribute")
+                                (get_attr_opt "locationline" attrs)
+          val column = Option.map (pgipint_of_string "location element column attribute")
+                                  (get_attr_opt "locationcolumn" attrs)
+          val char = Option.map (pgipint_of_string "location element char attribute")
+                                (get_attr_opt "locationcharacter" attrs)
+          val length = Option.map (pgipint_of_string "location element length attribute")
+                                  (get_attr_opt "locationlength" attrs)
       in 
-	  {descr=descr, url=url, line=line, column=column, char=char, length=length}
+          {descr=descr, url=url, line=line, column=column, char=char, length=length}
       end
 end
 
 (** Preferences **)
 
 type preference = { name: string,
-		    descr: string option,
-		    default: string option,
-		    pgiptype: pgiptype }
+                    descr: string option,
+                    default: string option,
+                    pgiptype: pgiptype }
 
 fun haspref ({ name, descr, default, pgiptype}:preference) = 
     XML.Elem ("haspref",
-	      attr "name" name @
-	      opt_attr "descr" descr @
-	      opt_attr "default" default,
-	      [pgiptype_to_xml pgiptype])
+              attr "name" name @
+              opt_attr "descr" descr @
+              opt_attr "default" default,
+              [pgiptype_to_xml pgiptype])
 
 end
 
--- a/src/Pure/ProofGeneral/pgml.ML	Wed Aug 27 11:49:50 2008 +0200
+++ b/src/Pure/ProofGeneral/pgml.ML	Wed Aug 27 12:00:28 2008 +0200
@@ -18,29 +18,29 @@
     datatype pgmldec = Bold | Italic | Error | Warning | Info | Other of string
 
     datatype pgmlaction = Toggle | Button | Menu
-					    
+                                            
     datatype pgmlterm = 
-	     Atoms of { kind: string option, content: pgmlatom list }
-	   | Box of { orient: pgmlorient option, indent: int option, content: pgmlterm list }
-	   | Break of { mandatory: bool option, indent: int option }
-	   | Subterm of { kind: string option,
-			  param: string option,
-			  place: pgmlplace option,
-			  name: string option,
-			  decoration: pgmldec option,
-			  action: pgmlaction option,
-			  pos: string option,
-			  xref: PgipTypes.pgipurl option,
-			  content: pgmlterm list }
-	   | Alt of { kind: string option, content: pgmlterm list }
-	   | Embed of XML.tree list
-	   | Raw of XML.tree
+             Atoms of { kind: string option, content: pgmlatom list }
+           | Box of { orient: pgmlorient option, indent: int option, content: pgmlterm list }
+           | Break of { mandatory: bool option, indent: int option }
+           | Subterm of { kind: string option,
+                          param: string option,
+                          place: pgmlplace option,
+                          name: string option,
+                          decoration: pgmldec option,
+                          action: pgmlaction option,
+                          pos: string option,
+                          xref: PgipTypes.pgipurl option,
+                          content: pgmlterm list }
+           | Alt of { kind: string option, content: pgmlterm list }
+           | Embed of XML.tree list
+           | Raw of XML.tree
 
     datatype pgml = 
-	     Pgml of { version: string option, systemid: string option, 
-		       area: PgipTypes.displayarea option, 
-		       content: pgmlterm list }
-		       
+             Pgml of { version: string option, systemid: string option, 
+                       area: PgipTypes.displayarea option, 
+                       content: pgmlterm list }
+                       
     val pgmlterm_to_xml : pgmlterm -> XML.tree
 
     val pgml_to_xml : pgml -> XML.tree
@@ -62,29 +62,29 @@
     datatype pgmldec = Bold | Italic | Error | Warning | Info | Other of string
 
     datatype pgmlaction = Toggle | Button | Menu
-					    
+                                            
     datatype pgmlterm = 
-	     Atoms of { kind: string option, content: pgmlatom list }
-	   | Box of { orient: pgmlorient option, indent: int option, content: pgmlterm list }
-	   | Break of { mandatory: bool option, indent: int option }
-	   | Subterm of { kind: string option,
-			  param: string option,
-			  place: pgmlplace option,
-			  name: string option,
-			  decoration: pgmldec option,
-			  action: pgmlaction option,
-			  pos: string option,
-			  xref: PgipTypes.pgipurl option,
-			  content: pgmlterm list }
-	   | Alt of { kind: string option, content: pgmlterm list }
-	   | Embed of XML.tree list
-	   | Raw of XML.tree
+             Atoms of { kind: string option, content: pgmlatom list }
+           | Box of { orient: pgmlorient option, indent: int option, content: pgmlterm list }
+           | Break of { mandatory: bool option, indent: int option }
+           | Subterm of { kind: string option,
+                          param: string option,
+                          place: pgmlplace option,
+                          name: string option,
+                          decoration: pgmldec option,
+                          action: pgmlaction option,
+                          pos: string option,
+                          xref: PgipTypes.pgipurl option,
+                          content: pgmlterm list }
+           | Alt of { kind: string option, content: pgmlterm list }
+           | Embed of XML.tree list
+           | Raw of XML.tree
 
-		       
+                       
     datatype pgml = 
-	     Pgml of { version: string option, systemid: string option, 
-		       area: PgipTypes.displayarea option, 
-		       content: pgmlterm list }
+             Pgml of { version: string option, systemid: string option, 
+                       area: PgipTypes.displayarea option, 
+                       content: pgmlterm list }
 
     fun pgmlorient_to_string HOVOrient = "hov"
       | pgmlorient_to_string HOrient = "h"
@@ -111,35 +111,35 @@
        would be better not to *)
     fun atom_to_xml (Sym {name,content}) = XML.Elem("sym",attr name name,[XML.Output content])
       | atom_to_xml (Str str) = XML.Output str 
-						    
+                                                    
     fun pgmlterm_to_xml (Atoms {kind, content}) = 
-	XML.Elem("atom",opt_attr "kind" kind, map atom_to_xml content)
+        XML.Elem("atom",opt_attr "kind" kind, map atom_to_xml content)
 
       | pgmlterm_to_xml (Box {orient, indent, content}) =
-	XML.Elem("box", 
-		 opt_attr_map pgmlorient_to_string "orient" orient @
-		 opt_attr_map int_to_pgstring "indent" indent,
-		 map pgmlterm_to_xml content)
+        XML.Elem("box", 
+                 opt_attr_map pgmlorient_to_string "orient" orient @
+                 opt_attr_map int_to_pgstring "indent" indent,
+                 map pgmlterm_to_xml content)
 
       | pgmlterm_to_xml (Break {mandatory, indent}) =
-	XML.Elem("break",
-		 opt_attr_map bool_to_pgstring "mandatory" mandatory @
-		 opt_attr_map int_to_pgstring "indent" indent, [])
+        XML.Elem("break",
+                 opt_attr_map bool_to_pgstring "mandatory" mandatory @
+                 opt_attr_map int_to_pgstring "indent" indent, [])
 
       | pgmlterm_to_xml (Subterm {kind, param, place, name, decoration, action, pos, xref, content}) =
-	XML.Elem("subterm", 
-  		 opt_attr "kind" kind @
-		 opt_attr "param" param @
-		 opt_attr_map pgmlplace_to_string "place" place @
-		 opt_attr "name" name @ 
-		 opt_attr_map pgmldec_to_string "decoration" decoration @
-		 opt_attr_map pgmlaction_to_string "action" action @ 
-		 opt_attr "pos" pos @
-		 opt_attr_map string_of_pgipurl "xref" xref,
-		 map pgmlterm_to_xml content)
+        XML.Elem("subterm", 
+                 opt_attr "kind" kind @
+                 opt_attr "param" param @
+                 opt_attr_map pgmlplace_to_string "place" place @
+                 opt_attr "name" name @ 
+                 opt_attr_map pgmldec_to_string "decoration" decoration @
+                 opt_attr_map pgmlaction_to_string "action" action @ 
+                 opt_attr "pos" pos @
+                 opt_attr_map string_of_pgipurl "xref" xref,
+                 map pgmlterm_to_xml content)
 
       | pgmlterm_to_xml (Alt {kind, content}) = 
-	XML.Elem("alt", opt_attr "kind" kind, map pgmlterm_to_xml content)
+        XML.Elem("alt", opt_attr "kind" kind, map pgmlterm_to_xml content)
 
       | pgmlterm_to_xml (Embed xmls) = XML.Elem("embed", [], xmls)
 
@@ -147,14 +147,14 @@
 
 
     datatype pgml = 
-	     Pgml of { version: string option, systemid: string option, 
-		       area: PgipTypes.displayarea option, 
-		       content: pgmlterm list }
+             Pgml of { version: string option, systemid: string option, 
+                       area: PgipTypes.displayarea option, 
+                       content: pgmlterm list }
 
     fun pgml_to_xml (Pgml {version,systemid,area,content}) = 
-	XML.Elem("pgml",
-		 opt_attr "version" version @ 
-		 opt_attr "systemid" systemid @
-		 Option.getOpt(Option.map PgipTypes.attrs_of_displayarea area,[]),
-		 map pgmlterm_to_xml content)
+        XML.Elem("pgml",
+                 opt_attr "version" version @ 
+                 opt_attr "systemid" systemid @
+                 Option.getOpt(Option.map PgipTypes.attrs_of_displayarea area,[]),
+                 map pgmlterm_to_xml content)
 end
--- a/src/Pure/ProofGeneral/proof_general_emacs.ML	Wed Aug 27 11:49:50 2008 +0200
+++ b/src/Pure/ProofGeneral/proof_general_emacs.ML	Wed Aug 27 12:00:28 2008 +0200
@@ -178,7 +178,7 @@
     let
       val names = map Thm.get_name_hint (filter Thm.has_name_hint ths);
       val deps = Symtab.keys (fold Proofterm.thms_of_proof'
-				   (map Thm.proof_of ths) Symtab.empty);
+                                   (map Thm.proof_of ths) Symtab.empty);
     in
       if null names orelse null deps then ()
       else thm_deps_message (spaces_quote names, spaces_quote deps)
--- a/src/Pure/ProofGeneral/proof_general_pgip.ML	Wed Aug 27 11:49:50 2008 +0200
+++ b/src/Pure/ProofGeneral/proof_general_pgip.ML	Wed Aug 27 12:00:28 2008 +0200
@@ -763,7 +763,7 @@
         val location = #location vs   (* TODO: extract position *)
 
         val _ = start_delay_msgs ()   (* gather parsing errs/warns *)
-		    val doc = PgipParser.pgip_parser Position.none text
+        val doc = PgipParser.pgip_parser Position.none text
         val errs = end_delayed_msgs ()
 
         val sysattrs = PgipTypes.opt_attr "systemdata" systemdata