diff --git a/runtime/doc/usr_08.txt b/runtime/doc/usr_08.txt
index a5e21f3..57287d0 100644
--- a/runtime/doc/usr_08.txt
+++ b/runtime/doc/usr_08.txt
@@ -402,7 +402,7 @@
 "main.c" file, then make a split and show the differences: >
 
 	:edit main.c
-	:vertical diffsplit main.c~ 
+	:vertical diffsplit main.c~
 
 The ":vertical" command is used to make the window split vertically.  If you
 omit this, you will get a horizontal split.