Fix bad ternary statement in autocomplete user pill insertions (matrix-org#7977)

Author: t3chguy

src/editor/parts.ts

@@ -651,10 +651,10 @@ export class PartCreator {
  userId: string,
  ): [UserPillPart, PlainPart] {
  const pill = this.userPill(displayName, userId);
- const postfix = this.plain(
- insertTrailingCharacter &&
-  (SettingsStore.getValue("MessageComposerInput.insertTrailingComma") ? ": " : " "),
- );
+ if (!SettingsStore.getValue("MessageComposerInput.insertTrailingComma")) {
+ insertTrailingCharacter = false;
+ }
+ const postfix = this.plain(insertTrailingCharacter ? ": " : " ");
  return [pill, postfix];
  }
 }