message: Update src/editor/deserialize.js
diff: @@ -109,7 +109,8 @@ function parseElement(n, partCreator, lastNode, state) {
  const indent = " ".repeat(state.listDepth - 1);
  if (n.parentElement.nodeName === "OL") {
  // The markdown parser doesn't do nested indexed lists at all, but this supports it anyway.
  - let index = state.listIndex[state.listIndex.length - 1]++;
  + let index = state.listIndex[state.listIndex.length - 1];
  + state.listIndex[state.listIndex.length - 1] += 1;
  return partCreator.plain(`${indent}${index}. `);
  } else {
  return partCreator.plain(`${indent}- `);
  