src/diffinsights_web/apps/explore_author.py:347:19: F541 f-string without any placeholders

src/diffinsights_web/02-contributors_graph.py:571:18: SyntaxError: Cannot use named assignment expression (`:=`) on Python 3.7 (syntax was added in Python 3.8)

src/diffannotator/utils/git.py:1073:16: SyntaxError: Cannot use named assignment expression (`:=`) on Python 3.7 (syntax was added in Python 3.8)

src/diffannotator/utils/git.py:378:12: SyntaxError: Cannot use named assignment expression (`:=`) on Python 3.7 (syntax was added in Python 3.8)

src/diffannotator/lexer.py:33:30: F401 `pygments.util` imported but unused

src/diffannotator/gather_data.py:61:27: F401 `_typeshed.SupportsWrite` imported but unused

src/diffannotator/annotate.py:2773:14: SyntaxError: Cannot use parentheses within a `with` statement on Python 3.7 (syntax was added in Python 3.9)

src/diffannotator/annotate.py:2110:29: F841 Local variable `ex` is assigned to but never used

src/diffannotator/annotate.py:1562:41: F841 Local variable `ex` is assigned to but never used