fix running go with absolute paths.

go/qst.go

var mappings = map[string]func(string) string{
	".go": func(name string) string {
		outpath := strings.TrimSuffix(name, path.Ext(name))
		return fmt.Sprintf("go build -o %s %s && ./%s", outpath, name, outpath)
		if !path.IsAbs(outpath) {
			outpath = fmt.Sprintf("./%s", outpath)
		}
		return fmt.Sprintf("go build -o %s %s && %s", outpath, name, outpath)
	},
	".rb": func(name string) string {
		return fmt.Sprintf("ruby %s", name)