Auto merge of #5901 - giraffate:add_reference_to_rustc_dev_guide, r=matthiaskrgr

Add reference to rustc-dev-guide about lint message

I think it would be better to add lint message convention to documentation. I referred to https://github.com/rust-lang/rust-clippy/pull/5888 and https://github.com/rust-lang/rust-clippy/pull/5893.

changelog: none
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bors 2020-08-13 13:54:53 +00:00
commit ba363bdbf9

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@ -295,8 +295,14 @@ impl EarlyLintPass for FooFunctions {
Running our UI test should now produce output that contains the lint message.
According to [the rustc-dev-guide], the text should be matter of fact and avoid
capitalization and periods, unless multiple sentences are needed.
When code or an identifier must appear in a message or label, it should be
surrounded with single acute accents \`.
[check_fn]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_lint/trait.EarlyLintPass.html#method.check_fn
[diagnostics]: https://github.com/rust-lang/rust-clippy/blob/master/clippy_lints/src/utils/diagnostics.rs
[the rustc-dev-guide]: https://rustc-dev-guide.rust-lang.org/diagnostics.html
## Adding the lint logic