Wrong number of arguments in string formating

[mih]

https://github.com/gitpython-developers/GitPython/blob/master/git/remote.py#L709

File ".../site-packages/git/remote.py", line 709, in _assert_refspec
    msg += " 'git config --add \"remote.%s.fetch +refs/heads/*:refs/heads/*\"'." % (self.name, self.name)
TypeError: not all arguments converted during string formatting

[Byron]

Thanks for letting me know!