docs: function (src) {
      if (isConstant(src)) {
        return this.buffer(toConstant(src) + '')
      }
      if (this.lastBufferedIdx == this.buf.length && this.bufferedConcatenationCount < 100) {
        this.bufferedConcatenationCount++;
        if (this.lastBufferedType === 'text') this.lastBuffered += '"';
        this.lastBufferedType = 'code';
        this.lastBuffered += ' + (' + src + ')';
        this.buf[this.lastBufferedIdx - 1] = 'pug_html = pug_html + (' + this.bufferStartChar + this.lastBuffered + ');';
      } else {
        this.bufferedConcatenationCount = 0;
        this.buf.push('pug_html = pug_html + (' + src + ');');
        this.lastBufferedType = 'code';
        this.bufferStartChar = '';
        this.lastBuffered = '(' + src + ')';
        this.lastBufferedIdx = this.buf.length;
      }
    }