Fixed #20364 -Added a passing test to Chris Piwoński's set that confirms URLs in quotes followed by commas are handled correctly by his patch.

Fixed #20364 -Added a passing test that confirms URLs in quotes followed by commas are handled correctly by Chris Piwoński's patch.
 On branch grg-urlize-tests
        modified:   tests/defaultfilters/tests.py

Applied the urlize patch at: https://code.djangoproject.com/attachment/ticket/20364/20364.diff
 On branch grg-urlize
	modified:   django/utils/html.py

Refs #20364, urlize correct rendering beggining or trailing quotas of url.

Fixed #20364 -Added a passing test to Chris Piwoński's set that confirms URLs in quotes followed by commas are handled correctly by his patch.