fix comment

Author: mattn

dep_test.go

@@ -478,6 +478,8 @@ func (tg *testgoData) mustNotExist(path string) {
 
 // cleanup cleans up a test that runs testgo.
 func (tg *testgoData) cleanup() {
+	// NOTE(mattn): It seems that sometimes git.exe is not dead
+	// when cleanup() is called. But we do not know any way to wait for it.
 	if runtime.GOOS == "windows" {
 		mu.Lock()
 		exec.Command(`taskkill`, `/F`, `/IM`, `git.exe`).Run()
@@ -494,8 +496,6 @@ func (tg *testgoData) cleanup() {
 		tg.check(os.RemoveAll(path))
 	}
 	if tg.tempdir != "" {
-		// NOTE(mattn): It seems that sometimes git.exe is not dead
-		// when clean() is called. But we do not know any way to wait for it.
 		tg.check(os.RemoveAll(tg.tempdir))
 	}
 }