--- a/mercurial/help/config.txt	Fri Aug 25 11:20:34 2017 -0700
+++ b/mercurial/help/config.txt	Tue Aug 29 18:20:50 2017 -0700
@@ -313,6 +313,9 @@
 ``ignorews``
     Ignore white space when comparing lines.
 
+``ignorewseol``
+    Ignore white space at the end of a line when comparing lines.
+
 ``ignorewsamount``
     Ignore changes in the amount of white space.