message: Fix typo as found by Luke
diff: @@ -67,7 +67,7 @@ function textForMemberEvent(ev) {
  senderName,
  oldDisplayName: prevContent.displayname,
  });
  - } else if (prevContent.avatar_url && !prevContent.avatar_url) {
  + } else if (prevContent.avatar_url && !content.avatar_url) {
  return _t('%(senderName)s removed their profile picture.', {senderName});
  } else if (prevContent.avatar_url && content.avatar_url &&
  prevContent.avatar_url !== content.avatar_url) {
  