Fixes #4348
Reviewed by Brett

Will backport to 2.4.

patch from Ziga Seilnacht

that their could be an arbitrary number of values passed in. Turns out the code
did not match that. The code now matches the docs.

svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3

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  r66985 | benjamin.peterson | 2008-10-20 16:43:46 -0500 (Mon, 20 Oct 2008) | 1 line

  no need to use nested try, except, finally
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  r67170 | benjamin.peterson | 2008-11-08 12:28:31 -0600 (Sat, 08 Nov 2008) | 1 line

  fix #4271: fix_imports didn't recognize imports with parenthesis (ie from x import (a, b))
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  r67173 | benjamin.peterson | 2008-11-08 17:42:08 -0600 (Sat, 08 Nov 2008) | 1 line

  consolidate test
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  r67177 | benjamin.peterson | 2008-11-09 21:52:52 -0600 (Sun, 09 Nov 2008) | 1 line

  let the metclass fixer handle complex assignments in the class body gracefully
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  r67178 | benjamin.peterson | 2008-11-10 15:26:43 -0600 (Mon, 10 Nov 2008) | 1 line

  the metaclass fixers shouldn't die when bases are not a simple name
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  r67179 | benjamin.peterson | 2008-11-10 15:29:58 -0600 (Mon, 10 Nov 2008) | 1 line

  allow the fix_import pattern to catch from imports with parenthesis
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Also, give assignment to None a better error message