Fix usage to not incorrectly state that the refresh option is on by default

As far as I can tell, it was off by default since when it was introduced in
ffc0be87d7eca4de4dbc91d740d36b7b40bfa911, and unless I have read the history
wrong, has never been enabled by default.

diff --git a/doc/usage.mdwn b/doc/usage.mdwn
index 427a51f3bac26d42d249a8c3b29419a7c87cc862..13a901cd3058cf6e7989a4ec7ae5decd1fa0e960 100644 (file)
--- a/doc/usage.mdwn
+++ b/doc/usage.mdwn
@@ -23,8 +23,7 @@ These options control the mode that ikiwiki operates in.
 
 * --refresh
 
-  Refresh the wiki, updating any changed pages. This is the default
-  behavior so you don't normally need to specify it.
+  Refresh the wiki, updating any changed pages.
 
 * --rebuild