Fix typo in "osc revert" help

Author: jonsger

osc/commandline.py

@@ -8937,7 +8937,7 @@ def do_revert(self, subcmd, opts, *files):
 
         Examples:
             osc revert <modified file(s)>
-            ose revert .
+            osc revert .
         Note: this only works for package working copies
 
         ${cmd_usage}