Function maybeReadMore

packages/main/test/pages/diffable-html.js:6591–6596

(stream, state)

    // However, if we're not ended, or reading, and the length < hwm,
    // then go ahead and try to read some more preemptively.
    function maybeReadMore(stream, state) {
      if (!state.readingMore) {
        state.readingMore = true;
        pna.nextTick(maybeReadMore_, stream, state);
      }
    }

    function maybeReadMore_(stream, state) {
      var len = state.length;