[musharna]

A # pragma: no mutate at the end of a line inside brackets is ignored, so that line is still mutated:

def inner(a, b):
    return max(
        a + 1,  # pragma: no mutate
        b - 1,
    )

visit_SimpleStatementLine only reads node.trailing_whitespace.comment. A comment that ends a line inside a call, a literal or a parenthesized condition belongs to a ParenthesizedWhitespace node instead, so no visitor sees it. README:375 says the bare pragma disables mutation "on this single line".

This adds visit_ParenthesizedWhitespace, which records that line for a bare pragma. Only that line is skipped; the other lines of the statement are still mutated.

Real run (mutmut run on a small package with the function above, a dict-literal version, and a single-line return a + 1 # pragma: no mutate as a control):

• main: 16 mutants; 4 of 8 in inner and 4 of 8 in the dict function change the pragma line; the single-line control has 0
• this branch: 8 mutants, none on a pragma line

Tests: three PragmaVisitor cases (call argument, dict entry, parenthesized if condition), a control showing that other comments inside brackets are ignored, and two end-to-end cases in test_mutation.py. With pragma_handling.py reverted to main, exactly the 5 new cases fail and the control passes. uv run pytest: 472 passed, 4 skipped; one tests/workers/test_timeout.py case failed under heavy load (on main, a different timeout case failed the same way), and that file passes 8/8 when run alone. pre-commit run --all-files is clean.

Not changed:

• A pragma on the closing ) line still maps to the statement's first line (return max(), so the arguments are mutated. It's unclear whether that pragma should cover the whole statement, so I left it alone.
• block/start/end inside brackets are not handled; only the bare pragma is.

AI assistance: this change and its tests were drafted with Claude Opus 5.5 (claude-opus-5-5). I ran the commands and numbers above locally.

[boxed]

Thanks!