[syntax-errors] Irrefutable case pattern before final case (#16905)

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Summary
--

Detects irrefutable `match` cases before the final case using a modified
version
of the existing `Pattern::is_irrefutable` method from the AST crate. The
modified method helps to retrieve a more precise diagnostic range to
match what
Python 3.13 shows in the REPL.

Test Plan
--

New inline tests, as well as some updates to existing tests that had
irrefutable
patterns before the last block.

...

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Brent Westbrook 2025-03-26 12:27:16 -04:00 • committed by GitHub

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crates/ruff_python_parser/tests/snapshots/valid_syntax@statement__match.py.snap

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