src/Sequents/Modal0.thy
changeset 69618 a96320074298
parent 69605 3dda49e08b9d
--- a/src/Sequents/Modal0.thy	Sun Jan 06 13:44:33 2019 +0100
+++ b/src/Sequents/Modal0.thy	Sun Jan 06 15:04:34 2019 +0100
@@ -7,7 +7,7 @@
 imports LK0
 begin
 
-ML_file "modal.ML"
+ML_file \<open>modal.ML\<close>
 
 consts
   box           :: "o\<Rightarrow>o"       ("[]_" [50] 50)