--- a/src/HOL/Fun_Def_Base.thy Sun Jan 06 13:44:33 2019 +0100
+++ b/src/HOL/Fun_Def_Base.thy Sun Jan 06 15:04:34 2019 +0100
@@ -8,15 +8,15 @@
imports Ctr_Sugar Set Wellfounded
begin
-ML_file "Tools/Function/function_lib.ML"
+ML_file \<open>Tools/Function/function_lib.ML\<close>
named_theorems termination_simp "simplification rules for termination proofs"
-ML_file "Tools/Function/function_common.ML"
-ML_file "Tools/Function/function_context_tree.ML"
+ML_file \<open>Tools/Function/function_common.ML\<close>
+ML_file \<open>Tools/Function/function_context_tree.ML\<close>
attribute_setup fundef_cong =
\<open>Attrib.add_del Function_Context_Tree.cong_add Function_Context_Tree.cong_del\<close>
"declaration of congruence rule for function definitions"
-ML_file "Tools/Function/sum_tree.ML"
+ML_file \<open>Tools/Function/sum_tree.ML\<close>
end