Test case for https://github.com/rust-lang/rust-mode/pull/269

test.rs

struct Foo {}

impl Bar for Foo {
    fn dummy_spacer() -> bool {
        false
    }

    fn dummy_spacer() -> bool {
        false
    }

    fn dummy_spacer() -> bool {
        false
    }

    fn dummy_spacer() -> bool {
        false
    }

    fn dummy_spacer() -> bool {
        false
    }

    fn dummy_spacer() -> bool {
        false
    }

    fn dummy_spacer() -> bool {
        false
    }

    fn dummy_spacer() -> bool {
        false
    }

    fn dummy_spacer() -> bool {
        false
    }

    fn dummy_spacer() -> bool {
        false
    }

    fn dummy_spacer() -> bool {
        false
    }

    // 1) place cursor here
    // 2) center file on cursor (C-l)
    // 3) reformat the function moving "param1: String," next to "&self"
    /*
         fn test_function(
             &self, param1: String,
             param2: String,
             param3: String,
             param4: String,
         ...
     */
    // 4) save file
    fn test_function(
        &self,
        param1: String,
        param2: String,
        param3: String,
        param4: String,
    ) -> bool {
        false
    }
}