[PATCH] mdiff: use fallback arg of get() instead of if-clause

[Alexis S. L. Carvalho]

Thus spake Christian Ebert:
> mdiff: use fallback arg of get() instead of if-clause
> 
> diff -r bbdba01cce28 -r b13889f48552 mercurial/mdiff.py
> --- a/mercurial/mdiff.py	Wed Jan 17 22:19:36 2007 +0100
> +++ b/mercurial/mdiff.py	Thu Jan 18 14:54:43 2007 +0100
> @@ -38,14 +38,9 @@
>          'ignoreblanklines': False,
>          }
>  
> -    __slots__ = defaults.keys()
> -
>      def __init__(self, **opts):
> -        for k in self.__slots__:
> -            v = opts.get(k)
> -            if v is None:
> -                v = self.defaults[k]
> -            setattr(self, k, v)
> +        for k in self.defaults:
> +            setattr(self, k, opts.get(k, self.defaults[k]))

This doesn't really work since some code (e.g. commands.diff) assumes it
can pass a value of None to mean "use the default value".

Alexis