src/HOL/IsaMakefile

 	@$(ISABELLE_TOOL) usedir -b -f plain.ML -g true $(OUT)/Pure HOL-Plain
 
 MAIN_DEPENDENCIES = $(PLAIN_DEPENDENCIES) \
   ATP_Linkup.thy \
   Code_Eval.thy \
-  Code_Message.thy \
   Equiv_Relations.thy \
   Groebner_Basis.thy \
   Hilbert_Choice.thy \
   IntDiv.thy \
   Int.thy \

   Map.thy \
   Nat_Numeral.thy \
   Presburger.thy \
   Recdef.thy \
   SetInterval.thy \
+  String.thy \
   $(SRC)/Provers/Arith/assoc_fold.ML \
   $(SRC)/Provers/Arith/cancel_numeral_factor.ML \
   $(SRC)/Provers/Arith/cancel_numerals.ML \
   $(SRC)/Provers/Arith/combine_numerals.ML \
   $(SRC)/Provers/Arith/extract_common_term.ML \