diff -r d80b2df54d31 -r a96320074298 src/Doc/Isar_Ref/Base.thy
--- a/src/Doc/Isar_Ref/Base.thy	Sun Jan 06 13:44:33 2019 +0100
+++ b/src/Doc/Isar_Ref/Base.thy	Sun Jan 06 15:04:34 2019 +0100
@@ -4,6 +4,6 @@
 imports Pure
 begin
 
-ML_file "../antiquote_setup.ML"
+ML_file \<open>../antiquote_setup.ML\<close>
 
 end