change the message template to one vim likes

The default message template, with a colon after the filename,
works better in vim as an error file (:cfile). Switch, because
I don't think anyone else depends on the exact syntax and both forms
are clear-ish to humans.

Author: jepler

.pylintrc

@@ -72,7 +72,7 @@ evaluation=10.0 - ((float(5 * error + warning + refactor + convention) / stateme
 
 # Template used to display messages. This is a python new-style format string
 # used to format the message information. See doc for all details
-msg-template='{path} {line}: {msg} ({symbol})'
+msg-template='{path}:{line}: {msg} ({symbol})'
 
 # Set the output format. Available formats are text, parseable, colorized, json
 # and msvs (visual studio).You can also give a reporter class, eg