message: don't accept as part of command, allow to create pill candidate
  so if you type these 3 characters, you get the correct autocomplete
diff: @@ -465,10 +465,6 @@ export class CommandPartCreator extends PartCreator {
  }
  class CommandPart extends PillCandidatePart {
  - acceptsInsertion(chr, i) {
  - return PlainPart.prototype.acceptsInsertion.call(this, chr, i);
  - }
  -
  get type() {
  return "command";
  }
  