only uncombine combinators in textual Isar proofs, not in Metis

--- a/src/HOL/Tools/ATP/atp_reconstruct.ML	Mon Jun 06 20:36:35 2011 +0200
+++ b/src/HOL/Tools/ATP/atp_reconstruct.ML	Mon Jun 06 20:36:35 2011 +0200
@@ -584,7 +584,7 @@
 fun prop_from_atp ctxt textual sym_tab =
   let val thy = Proof_Context.theory_of ctxt in
     raw_prop_from_atp ctxt textual sym_tab
-    #> uncombine_term thy #> infer_formula_types ctxt
+    #> textual ? uncombine_term thy #> infer_formula_types ctxt
   end
 
 (**** Translation of TSTP files to Isar proofs ****)