Changes:
- Add a function search_same_list which return a list of matched expressions
- Change the match_same_arms implementation behaviour. It will lint each same arms found.

Changes:
- Add a test to match multiple arms in the same match statement

Changes:
- Refactor the common case search into a function.
- Fix the useless Option around the vec in the search_same_list.

Changes:
- Fix stderr breaking the tests
- Adding tests over the if arms

…lip1995

Fix match_same_arms to fail late

Changes:
- Add a function search_same_list which return a list of matched expressions
- Change the match_same_arms implementation behavior. It will lint each same arms found.

fixes rust-lang#4096

changelog: none

Improve non ascii literal

This PR improves the example of the [non_ascii_literal](https://rust-lang.github.io/rust-clippy/master/index.html#non_ascii_literal) lint.
It also makes it auto-fixable.

Please review. This is my first PR to this project.
(Thanks @flip1995 for the help :)

changelog: none
fixes rust-lang#4117