Charlie Marsh d574fcd1ac Compare formatted and unformatted ASTs during formatter tests (#8624) ... ## Summary This PR implements validation in the formatter tests to ensure that we don't modify the AST during formatting. Black has similar logic. In implementing this, I learned that Black actually _does_ modify the AST, and their test infrastructure normalizes the AST to wipe away those differences. Specifically, Black changes the indentation of docstrings, which _does_ modify the AST; and it also inserts parentheses in `del` statements, which changes the AST too. Ruff also does both these things, so we _also_ implement the same normalization using a new visitor that allows for modifying the AST. Closes https://github.com/astral-sh/ruff/issues/8184. ## Test Plan `cargo test`		2023-11-13 17:43:27 +00:00
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snapshots	Apply consistent code block labels (#8563)	2023-11-09 01:49:24 +00:00
fixtures.rs	Compare formatted and unformatted ASTs during formatter tests (#8624)	2023-11-13 17:43:27 +00:00
normalizer.rs	Compare formatted and unformatted ASTs during formatter tests (#8624)	2023-11-13 17:43:27 +00:00