style: Fix indentation test file missing whitespace
Commit 764586d "indentation: Fix indent-sequences in nested collections"
introduced 2 style-related problems:
    tests/rules/test_indentation.py:1394:45: E231 missing whitespace after ','
    tests/rules/test_indentation.py:1402:45: E231 missing whitespace after ','
Let's fix them.
			
			
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