fixed bash-for-windows

cmd/bash/main.go

@@ -43,7 +43,7 @@ func runFile(path string, args []string) error {
 		return fmt.Errorf("%s: %v", path, err)
 	}
 	sh := shell.New()
-	sh.SetArgs(append([]string{path}, args...))
+	sh.SetArgs(args)
 	sh.SetVar("0", path)
 	return sh.Execute(string(data))
 }