pazz/alot — pull request #573 by lzap (2013-02-26 12:13:50+00:00)
Title: correcting error message for theme

When there was a theme parse error, alot was producing incorrect exception:

```
in read_config raise ConfigError((err_msg % str(themestring)) + e.message)
TypeError: cannot concatenate 'str' and 'ParseError' objects
```