This test exercises behavior of change signature refactoring with respect to
comments.

Currently, inline comments around arguments or parameters are dropped, which is
probably acceptable. Fixing this is likely intractible without fixing comment
representation in the AST.

-- go.mod --
module unused.mod

go 1.18

-- a/a.go --
package a

// A doc comment.
func A(x /* used parameter */, unused int /* unused parameter */ ) int { //@codeaction("unused", "unused", "refactor.rewrite.removeUnusedParam", a)
	// about to return
	return x // returning
	// just returned
}

// This function makes calls.
func _() {
	// about to call
	A(one() /* used arg */, 2 /* unused arg */) // calling
	// just called
}

func one() int {
	// I should be unaffected!
	return 1
}

-- @a/a/a.go --
package a

// A doc comment.
func A(x int) int { //@codeaction("unused", "unused", "refactor.rewrite.removeUnusedParam", a)
	// about to return
	return x // returning
	// just returned
}

// This function makes calls.
func _() {
	// about to call
	A(one()) // calling
	// just called
}

func one() int {
	// I should be unaffected!
	return 1
}