text_pango: Fix & in markup text
text_pango: Fix & in markup text

kivy/kivy,rnixx/kivy,matham/kivy,matham/kivy,rnixx/kivy,matham/kivy,inclement/kivy,inclement/kivy,matham/kivy,akshayaurora/kivy,kivy/kivy,akshayaurora/kivy,akshayaurora/kivy,kivy/kivy,inclement/kivy,rnixx/kivy