bors 0929a24d72 Auto merge of #6828 - mgacek8:issue_6758_enhance_wrong_self_convention, r=flip1995
wrong_self_convention: fix lint in case of `to_*_mut` method

fixes #6758
changelog: wrong_self_convention: fix lint in case of `to_*_mut` method. When a method starts with `to_` and ends with `_mut`, clippy expects a `&mut self` parameter, otherwise `&self`.

Any feedback is welcome. I was also thinking if shouldn't we treat `to_` the same way as `as_`. Namely to accept `self` taken:  `&self` or `&mut self`.
2021-03-15 22:36:57 +00:00
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