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clean up E0392 explanation

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Guillaume Gomez 2020-03-08 10:44:23 +01:00
parent f943349eaf
commit 2676afeca4
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src/librustc_error_codes/error_codes/E0392.md
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This error indicates that a type or lifetime parameter has been declared
but not actually used. Here is an example that demonstrates the error:
A type or lifetime parameter has been declared but is not actually used.
Erroneous code example:
```compile_fail,E0392
enum Foo<T> {