This test exercises extract on a variadic function.
It is a regression test for bug #63287 in which
the final paramater's "..." would go missing.

-- go.mod --
module example.com
go 1.18

-- a/a.go --
package a

//@codeactionedit(block, "refactor.extract", out, "Extract function")

func _() {
	var logf func(string, ...any)
	{ println(logf) } //@loc(block, re`{.*}`)
}

-- @out/a/a.go --
@@ -7 +7 @@
-	{ println(logf) } //@loc(block, re`{.*}`)
+	{ newFunction(logf) } //@loc(block, re`{.*}`)
@@ -10 +10,4 @@
+func newFunction(logf func( string,  ...any)) {
+	println(logf)
+}
+
-- end --