I don't think your comment is fair to the author. If there was not such caveat, then there would not be a need to write that article.
I don't think your comment is fair to the author. If there was not such caveat, then there would not be a need to write that article.
The author doesn't actually cover the caveat (3 newly valid backslash escapes in BREs) at all, so that's not the case.