diff -r f217bbe4e93e -r cfabbc083977 src/Doc/Isar_Ref/First_Order_Logic.thy
--- a/src/Doc/Isar_Ref/First_Order_Logic.thy	Fri Nov 13 14:11:54 2015 +0100
+++ b/src/Doc/Isar_Ref/First_Order_Logic.thy	Fri Nov 13 14:49:30 2015 +0100
@@ -1,3 +1,4 @@
+(*:maxLineLen=78:*)
 
 section \<open>Example: First-Order Logic\<close>