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Update CONTRIBUTING.md

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Oliver Schneider 2017-03-14 16:25:40 +01:00 committed by GitHub
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CONTRIBUTING.md
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@ -35,10 +35,9 @@ T-middle issues can be more involved and require verifying types. The
lot of methods that are useful, though one of the most useful would be `expr_ty` (gives the type of
an AST expression). `match_def_path()` in Clippy's `utils` module can also be useful.
Should you add a lint, try it on clippy itself using `util/dogfood.sh`. You may find that clippy
contains some questionable code itself! Also before making a pull request, please run
`util/update_lints.py`, which will update `lib.rs` and `README.md` with the lint declarations. Our
travis build actually checks for this.
Compiling clippy can take almost a minute or more depending on your machine.
You can set the environment flag `CARGO_INCREMENTAL=1` to cut down that time to
almost a third on average, depending on the influence your change has.
Clippy uses UI tests. UI tests check that the output of the compiler is exactly as expected.
Of course there's little sense in writing the output yourself or copying it around.