Normalize whitespace in function signatures

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extra : histedit_source : 471b9c3fbde309c39492f2a567a26993c1dc94de
Always return a boolean in DirectorySandbox._ok

--HG--
extra : histedit_source : b0072af02db4ba170105a4eb3f8a033dce678869
Use any for matching exceptions in DirectorySandbox.

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extra : histedit_source : 9a99f28235a96543a3ca2da4ec691da0e1cd880c
Use any on a generator instead

--HG--
extra : histedit_source : 7924e09d06d2f6db58371735314caeee77aa2d3d
Add support for exempting a path based on a regular expression.

--HG--
extra : histedit_source : 2f1f4146ec1d5196cb65602302185a12060cfa17
Exempt lib2to3 pickled grammars from the DirectorySandboxing. Fixes #121.

--HG--
extra : histedit_source : 6cd9a3c6003d3f6de2f8e676b61589db4dffafb0