--- a/src/HOL/Library/Simps_Case_Conv.thy Sun Jan 06 13:44:33 2019 +0100
+++ b/src/HOL/Library/Simps_Case_Conv.thy Sun Jan 06 15:04:34 2019 +0100
@@ -8,6 +8,6 @@
abbrevs "simps_of_case" "case_of_simps" = ""
begin
-ML_file "simps_case_conv.ML"
+ML_file \<open>simps_case_conv.ML\<close>
end