PR.registerLangHandler(PR.createSimpleLexer([
  ["pln", /^[\t\n\f\r ]+/, null, " \t\r\n"]
], [
  ["str", /^"(?:[^\n\f\r"\\]|\\(?:\r\n?|\n|\f)|\\[\S\s])*"/, null],
  ["str", /^'(?:[^\n\f\r'\\]|\\(?:\r\n?|\n|\f)|\\[\S\s])*'/, null],