Function append

static/editor.md/lib/codemirror/mode/jade/jade.js:207–212

(stream, state)

  }

  function append(stream, state) {
    if (stream.match(/^append\b/)) {
      state.restOfLine = 'variable';
      return KEYWORD;
    }
  }
  function prepend(stream, state) {
    if (stream.match(/^prepend\b/)) {
      state.restOfLine = 'variable';