Author eric.smith
Recipients barry, eric.smith, ezio.melotti, mrabarnett, rhettinger, serhiy.storchaka
Date 2015-12-07.13:31:20
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Here's the patch.

I added some more tests, including tests for ''.format_map(). I think the format_map() tests convince me that keeping None for non-matched groups makes sense.
Date User Action Args
2015-12-07 13:31:21eric.smithsetrecipients: + eric.smith, barry, rhettinger, ezio.melotti, mrabarnett, serhiy.storchaka
2015-12-07 13:31:21eric.smithsetmessageid: <>
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2015-12-07 13:31:21eric.smithcreate