shithub: kwa

ref: 7e6d7d36f83f05f372cfbce43534a2747bfc39c3
dir: /test/t.sub0/

{sub(/[aeiou]/, "foo"); print}
{sub("[aeiou]", "foo"); print}

{gsub(/[aeiou]/, "foo"); print}
{gsub("[aeiou]", "foo"); print}

{sub(/[aeiou]/, "&foo"); print}
{sub("[aeiou]", "&foo"); print}

{gsub(/[aeiou]/, "&foo"); print}
{gsub("[aeiou]", "&foo"); print}

{sub(/[aeiou]/, "\&foo"); print}
{sub("[aeiou]", "\&foo"); print}

{gsub(/[aeiou]/, "\&foo"); print}
{gsub("[aeiou]", "\&foo"); print}