message: Remove repeated word in in dep: error message
diff: @@ -182,7 +182,7 @@ pub(super) fn activation_error(
  msg.push_str("` does not have these features.\n");
  msg.push_str(
  " It has an optional dependency with that name, \
  - but but that dependency uses the \"dep:\" \
  + but that dependency uses the \"dep:\" \
  syntax in the features table, so it does not have an \
  implicit feature with that name.\n",
  );
  