diff -r d80b2df54d31 -r a96320074298 src/HOL/Library/Conditional_Parametricity.thy
--- a/src/HOL/Library/Conditional_Parametricity.thy	Sun Jan 06 13:44:33 2019 +0100
+++ b/src/HOL/Library/Conditional_Parametricity.thy	Sun Jan 06 15:04:34 2019 +0100
@@ -43,6 +43,6 @@
 
 end
 
-ML_file "conditional_parametricity.ML"
+ML_file \<open>conditional_parametricity.ML\<close>
 
 end