Always set phone numbers to left-to-right
Phone numbers in international format starts with a "+", which according to Unicode text directional rules is considered "weak" (https://en.wikipedia.org/wiki/Bidirectional_text#Neutral_characters) which leads Pango to layout the text in some weird fashion depending on if the string contains spaces and punctiations. To avoid this always precede with a LTR marker (and even with east Arabic digits, the text direction of numbers is LTR)