minirst: reindent _admonitiontitles

I don't like the verical indent.

While I was here, I cleaned up some whitespace and added a trailing
comma on the last element.

mercurial/minirst.py

@@ -452,7 +452,8 b' def findadmonitions(blocks, admonitions='
         i = i + 1
     return blocks
 
-_admonitiontitles = {'attention': _('Attention:'),
+_admonitiontitles = {
+    'attention': _('Attention:'),
                      'caution': _('Caution:'),
                      'danger': _('!Danger!')  ,
                      'error': _('Error:'),
@@ -460,7 +461,8 b' def findadmonitions(blocks, admonitions='
                      'important': _('Important:'),
                      'note': _('Note:'),
                      'tip': _('Tip:'),
-                     'warning': _('Warning!')}
+    'warning': _('Warning!'),
+}
 
 def formatoption(block, width):
     desc = ' '.join(map(str.strip, block['lines']))