--- a/src/HOL/BNF_Composition.thy Sun Jan 06 13:44:33 2019 +0100
+++ b/src/HOL/BNF_Composition.thy Sun Jan 06 15:04:34 2019 +0100
@@ -178,9 +178,9 @@
lemma type_definition_id_bnf_UNIV: "type_definition id_bnf id_bnf UNIV"
unfolding id_bnf_def by unfold_locales auto
-ML_file "Tools/BNF/bnf_comp_tactics.ML"
-ML_file "Tools/BNF/bnf_comp.ML"
-ML_file "Tools/BNF/bnf_lift.ML"
+ML_file \<open>Tools/BNF/bnf_comp_tactics.ML\<close>
+ML_file \<open>Tools/BNF/bnf_comp.ML\<close>
+ML_file \<open>Tools/BNF/bnf_lift.ML\<close>
hide_fact
DEADID.inj_map DEADID.inj_map_strong DEADID.map_comp DEADID.map_cong DEADID.map_cong0