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Update CONTRIBUTING.md to reflect the new parser (#11434) 

## Summary

CONTRIBUTING.md says that `cargo dev print-ast` uses the old RuffPython
parser, even though, as far as I can tell, it uses the shiny new parser.
This PR fixes this.

## Test Plan

CI jobs should do the trick -- I didn't modify any code.
This commit is contained in:
Léopold Mebazaa 2024-05-15 16:36:28 +02:00 committed by GitHub
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@ -637,11 +637,11 @@ Otherwise, follow the instructions from the linux section.
`cargo dev` is a shortcut for `cargo run --package ruff_dev --bin ruff_dev`. You can run some useful
utils with it:
- `cargo dev print-ast <file>`: Print the AST of a python file using the
[RustPython parser](https://github.com/astral-sh/ruff/tree/main/crates/ruff_python_parser) that is
mainly used in Ruff. For `if True: pass # comment`, you can see the syntax tree, the byte offsets
for start and stop of each node and also how the `:` token, the comment and whitespace are not
represented anymore:
- `cargo dev print-ast <file>`: Print the AST of a python file using Ruff's
[Python parser](https://github.com/astral-sh/ruff/tree/main/crates/ruff_python_parser).
For `if True: pass # comment`, you can see the syntax tree, the byte offsets for start and
stop of each node and also how the `:` token, the comment and whitespace are not represented
anymore:
```text
[