Some comment cleanup.

redo/uitask.go

@@ -19,9 +19,9 @@ func Go() error {
 	return nil
 }
 
-// Stop issues a Request for package ui to stop.
+// Stop issues a Request for package ui to stop and returns immediately.
 // Some time after this request is received, Go() will return without performing any final cleanup.
-// Stop is internally issued to ui.Do, so it will not be registered until any event handlers and dialog boxes return.
+// Stop is internally issued to Do, so it will not be registered until any event handlers and dialog boxes return.
 func Stop() {
 	go func() {
 		c := make(chan interface{})

redo/uitask_windows.go

@@ -46,7 +46,6 @@ func uimsgloop() {
 }
 
 func uistop() {
-	// this works fine as documented in modal loops, as modal loops are supposed to repost quit messages (http://blogs.msdn.com/b/oldnewthing/archive/2005/02/22/378018.aspx), and all the Windows internal ones do
 	f_PostQuitMessage(0)
 }