Cleaned up some tests I broke as a result of the escapejs changes in [8577].

u'Hello world'

>>> escapejs(u'"double quotes" and \'single quotes\'')

u'\\"double quotes\\" and \\\'single quotes\\\''

u'\\x22double quotes\\x22 and \\x27single quotes\\x27'

>>> escapejs(ur'\ : backslashes, too')

u'\\\\ : backslashes, too'

u'\\x5C : backslashes, too'

>>> escapejs(u'and lots of whitespace: \r\n\t\v\f\b')

u'and lots of whitespace: \\r\\n\\t\\v\\f\\b'

u'and lots of whitespace: \\x0D\\x0A\\x09\\x0B\\x0C\\x08'

>>> escapejs(ur'<script>and this</script>')

u'<script>and this<\\/script>'

u'\\x3Cscript\\x3Eand this\\x3C/script\\x3E'

>>> fix_ampersands(u'Jack & Jill & Jeroboam')

u'Jack & Jill & Jeroboam'