gistfile1.txt

a = 'foo<script src="jquery-2.1.1.js"></script>bar'
b = '<script src="jquery-2.1.1.js"></script>'
c = "Bootstrap\\'s JavaScript requires jQuery"
a.gsub(b, c) => "fooBootstrapbars JavaScript requires jQuerybar"
a.gsub(Regexp.quote(b), c) => "foo<script src=\"jquery-2.1.1.js\"></script>bar"
a.gsub(Regexp.quote(b), Regexp.quote(c)) => "foo<script src=\"jquery-2.1.1.js\"></script>bar"
a.gsub(b, Regexp.quote(c)) => "fooBootstrap\\'s\\ JavaScript\\ requires\\ jQuerybar"

I want:
a.replace(b, c) =>  'fooBootstrap\\'s JavaScript requires jQuery</script>bar'