Merge branch 'master' of github.com:nvbn/thefuck

thefuck/rules/git_diff_staged.py

@@ -10,4 +10,4 @@ def match(command, settings):
 
 @utils.git_support
 def get_new_command(command, settings):
-    return '{} --staged'.format(command.script)
+    return command.script.replace(' diff', ' diff --staged')

thefuck/rules/sudo.py

@@ -14,6 +14,7 @@ patterns = ['permission denied',
             'need to be root',
             'need root',
             'only root can do that',
+            'You don\'t have access to the history DB.',
             'authentication is required']