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Rollup merge of #121860 - mu001999:master, r=Nilstrieb

Add a tidy check that checks whether the fluent slugs only appear once

As ``````@Nilstrieb`````` said in https://github.com/rust-lang/rust/pull/121828#issuecomment-1972622855:
> Might make sense to have a tidy check that checks whether the fluent slugs only appear once in the source code and lint for that
there's a tidy check already for sorting

We can get the tidy check error:
```
tidy check
tidy error: /path/to/rust/compiler/rustc_const_eval/messages.ftl: message `const_eval_invalid_align` is not used
tidy error: /path/to/rust/compiler/rustc_lint/messages.ftl: message `lint_trivial_untranslatable_diag` is not used
tidy error: /path/to/rust/compiler/rustc_parse/messages.ftl: message `parse_invalid_literal_suffix` is not used
tidy error: /path/to/rust/compiler/rustc_infer/messages.ftl: message `infer_need_type_info_in_coroutine` is not used
tidy error: /path/to/rust/compiler/rustc_passes/messages.ftl: message `passes_expr_not_allowed_in_context` is not used
tidy error: /path/to/rust/compiler/rustc_passes/messages.ftl: message `passes_layout` is not used
tidy error: /path/to/rust/compiler/rustc_parse/messages.ftl: message `parse_not_supported` is not used
```

r? ``````@Nilstrieb``````
This commit is contained in:
Matthias Krüger 2024-03-10 10:58:16 +01:00 committed by GitHub
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8 changed files with 96 additions and 28 deletions

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@ -562,8 +562,6 @@ lint_suspicious_double_ref_clone =
lint_suspicious_double_ref_deref =
using `.deref()` on a double reference, which returns `{$ty}` instead of dereferencing the inner type
lint_trivial_untranslatable_diag = diagnostic with static strings only
lint_ty_qualified = usage of qualified `ty::{$ty}`
.suggestion = try importing it and using it unqualified