Disallow (unescaped) newlines in strings.
a { content: "first second"; ↑ } ↑ /** ↑ * The newline here */
The spec says this: “A string cannot directly contain a newline. To include a newline in a string, use an escape representing the line feed character in ISO-10646 (U+000A), such as ‘\A’ or ‘\00000a’.” And also: “It is possible to break strings over several lines, for aesthetic or other reasons, but in such a case the newline itself has to be escaped with a backslash (\).”
true
The following patterns are considered violations:
a { content: "first second"; }
[title="something is probably wrong"] {}
a { font-family: "Times New Roman"; }
The following patterns are not considered violations:
a { content: "first\Asecond"; }
a { content: "first\\nsecond"; }
[title="nothing\ is wrong"] {}
a { font-family: "Times New Roman"; }