fix: `let_with_type_underscore` don't eat closing paren in `let (i): _ = 0;` (#15386)

Apparently, one can surround a pattern with an arbitrary number of
parens, and the resulting `Pat` won't include the span of those parens.
And the previous approach extended the to-be-deleted span all the way to
the end of `Pat`'s span, so it included the closing paren.

I think the new approach is more robust anyway, since all we care to
remove (besides the `_`) is the `:`, so we search just for that.

~This does leave one extra whitespace in one of the test cases, but I'd
say let rustfmt handle that.~ fixed in the third commit

changelog: [`let_with_type_underscore`]: don't eat closing paren in `let
(i): _ = 0;`

fixes https://github.com/rust-lang/rust-clippy/issues/15377

0 files changed, 0 insertions, 0 deletions