Deprecation warnings in tests

[jayvdb]

[   98s] ebb_lint/test/test_flake8.py:42
[   98s]   /home/abuild/rpmbuild/BUILD/ebb-lint-0.19.1.0/ebb_lint/test/test_flake8.py:42: DeprecationWarning: Flags not at the start of the expression '\n    (?x)\n    \\$([A-' (truncated)
[   98s]     """)
[   98s] 
[   98s] ebb_lint/test/test_flake8.py::test_linting_with_filename[__init__.py-\n\n$L205$def spam():\n    pass\n\n    ]
[   98s]   /home/abuild/rpmbuild/BUILD/ebb-lint-0.19.1.0/ebb_lint/checkers/check_docstrings.py:19: DeprecationWarning: Flags not at the start of the expression '\n    (?xi)\n    \\A(?:' (truncated)
[   98s]     """)
[   98s]   /home/abuild/rpmbuild/BUILD/ebb-lint-0.19.1.0/ebb_lint/checkers/check_docstrings.py:33: DeprecationWarning: Flags not at the start of the expression '\n    (?x)\n    ^:\n   ' (truncated)
[   98s]     """)