Format expressions inside string interpolation like the rest (it used to be a+b instead of a + b, not too sure why)
Fix formatting some match branches when there were only one statement inside (it was inlined)
Fix parsing and formatting some comments edge case on struct field init. You should check out this test because the result is a bit different from before. I personally find it more logical but I would understand if the former format was to stay
Fix formatting of void-returning function signature
