gtk/testsuite/css/parser/string-values.css

n {
  font-family: "\A ";
}

r {
  font-family: "\C ";
}

f {
  font-family: "\D ";
}

a {
  font-family: "\"";
}

b {
  font-family: "\'";
}

c {
  font-family: "'";
}

d {
  font-family: "\\";
}