src/tools/rustfmt/tests/source/issue-1049.rs

// Test overlong function signature
pub unsafe fn reborrow_mut(&mut X: Abcde) -> Handle<NodeRef<marker::Mut, K, V, NodeType>, HandleType> {
}

pub fn merge(mut X: Abcdef) -> Handle<NodeRef<marker::Mut<'a>, K, V, marker::Internal>, marker::Edge> {
}

impl Handle {
    pub fn merge(a: Abcd) -> Handle<NodeRef<marker::Mut<'a>, K, V, marker::Internal>, marker::Edge> {
    }
}

// Long function without return type that should not be reformatted.
fn veeeeeeeeeeeeeeeeeeeeery_long_name(a: FirstTypeeeeeeeeee, b: SecondTypeeeeeeeeeeeeeeeeeeeeeee) {}

fn veeeeeeeeeeeeeeeeeeeeeery_long_name(a: FirstTypeeeeeeeeee, b: SecondTypeeeeeeeeeeeeeeeeeeeeeee) {}

fn veeeeeeeeeeeeeeeeeeeeeeery_long_name(a: FirstTypeeeeeeeeee, b: SecondTypeeeeeeeeeeeeeeeeeeeeeee) {}