Fix formatting errors in notifications module according to PEP8
Fix formatting errors in notifications module according to PEP8

Fixed the following format errors:
notifications/email.py:321:9: E201 whitespace after '('
notifications/email.py:321:9: E272 multiple spaces before keyword
notifications/email.py:322:9: E128 continuation line under-indented for visual indent

Testing Done:
Ran unit tests for notifications module, and ran pep8 again.

Reviewed at https://reviews.reviewboard.org/r/6632/

beol/reviewboard,KnowNo/reviewboard,chipx86/reviewboard,chipx86/reviewboard,bkochendorfer/reviewboard,KnowNo/reviewboard,reviewboard/reviewboard,reviewboard/reviewboard,bkochendorfer/reviewboard,beol/reviewboard,custode/reviewboard,bkochendorfer/reviewboard,custode/reviewboard,beol/reviewboard,davidt/reviewboard,brennie/reviewboard,bkochendorfer/reviewboard,sgallagher/reviewboard,davidt/reviewboard,KnowNo/reviewboard,custode/reviewboard,chipx86/reviewboard,davidt/reviewboard,davidt/reviewboard,sgallagher/reviewboard,beol/reviewboard,sgallagher/reviewboard,sgallagher/reviewboard,brennie/reviewboard,brennie/reviewboard,brennie/reviewboard,KnowNo/reviewboard,custode/reviewboard,reviewboard/reviewboard,chipx86/reviewboard,reviewboard/reviewboard