diff -r 90cd3c53a887 -r bc01725d7918 src/HOL/IMP/Procs_Dyn_Vars_Dyn.thy
--- a/src/HOL/IMP/Procs_Dyn_Vars_Dyn.thy	Fri May 17 02:57:00 2013 +0200
+++ b/src/HOL/IMP/Procs_Dyn_Vars_Dyn.thy	Fri May 17 08:19:52 2013 +0200
@@ -11,7 +11,7 @@
 Skip:    "pe \<turnstile> (SKIP,s) \<Rightarrow> s" |
 Assign:  "pe \<turnstile> (x ::= a,s) \<Rightarrow> s(x := aval a s)" |
 Seq:     "\<lbrakk> pe \<turnstile> (c\<^isub>1,s\<^isub>1) \<Rightarrow> s\<^isub>2;  pe \<turnstile> (c\<^isub>2,s\<^isub>2) \<Rightarrow> s\<^isub>3 \<rbrakk> \<Longrightarrow>
-          pe \<turnstile> (c\<^isub>1;c\<^isub>2, s\<^isub>1) \<Rightarrow> s\<^isub>3" |
+          pe \<turnstile> (c\<^isub>1;;c\<^isub>2, s\<^isub>1) \<Rightarrow> s\<^isub>3" |
 
 IfTrue:  "\<lbrakk> bval b s;  pe \<turnstile> (c\<^isub>1,s) \<Rightarrow> t \<rbrakk> \<Longrightarrow>
          pe \<turnstile> (IF b THEN c\<^isub>1 ELSE c\<^isub>2, s) \<Rightarrow> t" |
@@ -23,11 +23,11 @@
   "\<lbrakk> bval b s\<^isub>1;  pe \<turnstile> (c,s\<^isub>1) \<Rightarrow> s\<^isub>2;  pe \<turnstile> (WHILE b DO c, s\<^isub>2) \<Rightarrow> s\<^isub>3 \<rbrakk> \<Longrightarrow>
    pe \<turnstile> (WHILE b DO c, s\<^isub>1) \<Rightarrow> s\<^isub>3" |
 
-Var: "pe \<turnstile> (c,s) \<Rightarrow> t  \<Longrightarrow>  pe \<turnstile> ({VAR x;; c}, s) \<Rightarrow> t(x := s x)" |
+Var: "pe \<turnstile> (c,s) \<Rightarrow> t  \<Longrightarrow>  pe \<turnstile> ({VAR x; c}, s) \<Rightarrow> t(x := s x)" |
 
 Call: "pe \<turnstile> (pe p, s) \<Rightarrow> t  \<Longrightarrow>  pe \<turnstile> (CALL p, s) \<Rightarrow> t" |
 
-Proc: "pe(p := cp) \<turnstile> (c,s) \<Rightarrow> t  \<Longrightarrow>  pe \<turnstile> ({PROC p = cp;; c}, s) \<Rightarrow> t"
+Proc: "pe(p := cp) \<turnstile> (c,s) \<Rightarrow> t  \<Longrightarrow>  pe \<turnstile> ({PROC p = cp; c}, s) \<Rightarrow> t"
 
 code_pred big_step .