[issue1686] string.Template.safe_substitute fail when overriding pattern attribute

[David Stanek]

David Stanek <dstanek at dstanek.com> added the comment:

I am uploading a new diff that includes the original fix from Hagai
along with some tests.

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keywords: +patch
nosy: +dstanek
Added file: http://bugs.python.org/file9704/braced_override.diff

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