Yes? That doesn't specify that US numbers need the hyphens just gives two examples that happen to be in the US. When dialling the hyphens are ignored anyway and are not necessary.

Hi, thanks for catching and changing that! I just used the autocomplete from the JOSM preset, but I think that just suggests on what others are using and not if it is correct. According to the OSM wiki, a phone number with spaces in between is valid though in line with the E.123 standard.