--- a/src/Doc/JEdit/JEdit.thy Tue Dec 06 17:23:54 2016 +0100
+++ b/src/Doc/JEdit/JEdit.thy Tue Dec 06 17:38:46 2016 +0100
@@ -723,6 +723,11 @@
The above options are accessible in the menu \<^emph>\<open>Plugins / Plugin Options /
Isabelle / General\<close>.
+
+ \<^medskip> Automatic indentation has a tendency to produce trailing whitespace. That
+ can be purged manually with the jEdit action @{action "remove-trailing-ws"}
+ (shortcut \<^verbatim>\<open>C+e r\<close>). Moreover, the \<^emph>\<open>WhiteSpace\<close> plugin provides some
+ aggressive options to trim whitespace on buffer-save.
\<close>