Fix test style in unused parentheses lint test

[bravomikekilo]

Update test file to use #![deny(unused_parens)] + //~ ERROR annotations instead of pretty-json (see https://rust-lang.github.io/rustc-guide/tests/adding.html)

The files need to update are:

• test/lint/unused_parens_json_suggestions.rs
• test/lint/used_parens_remove_json_suggestion.rs

This issue has been assigned to @polyedre via this comment.

[JohnTitor]

is the correct file name use_suggestion_json.rs, not used_parens_remove_json_suggestion.rs?

And what about this comment?

rust/src/test/ui/lint/unused_parens_json_suggestion.rs

Lines 4 to 8 in 2c13edc

	// The output for humans should just highlight the whole span without showing
	// the suggested replacement, but we also want to test that suggested
	// replacement only removes one set of parentheses, rather than naïvely
	// stripping away any starting or ending parenthesis characters—hence this
	// test of the JSON error format.

[polyedre]

Is the problem fixed ? If not, I would like to work on it !

[JohnTitor]

@polyedre WIP PR has been closed due to inactivity so you can work on this.

[polyedre]

@JohnTitor I would like to be assigned to this issue. Am I supposed to do a new pull request ?

[JohnTitor]

@rustbot claim @polyedre

Go ahead!

[rustbot]

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