doc: more consistent working in uix/behaviors/button.py
doc: more consistent working in uix/behaviors/button.py

bionoid/kivy,andnovar/kivy,CuriousLearner/kivy,akshayaurora/kivy,kivy/kivy,rnixx/kivy,cbenhagen/kivy,kived/kivy,tony/kivy,el-ethan/kivy,darkopevec/kivy,matham/kivy,CuriousLearner/kivy,aron-bordin/kivy,KeyWeeUsr/kivy,vitorio/kivy,vitorio/kivy,matham/kivy,Cheaterman/kivy,CuriousLearner/kivy,rafalo1333/kivy,manthansharma/kivy,andnovar/kivy,jkankiewicz/kivy,bionoid/kivy,darkopevec/kivy,LogicalDash/kivy,el-ethan/kivy,jkankiewicz/kivy,Cheaterman/kivy,rnixx/kivy,arlowhite/kivy,jegger/kivy,KeyWeeUsr/kivy,matham/kivy,jegger/kivy,inclement/kivy,Cheaterman/kivy,kived/kivy,autosportlabs/kivy,akshayaurora/kivy,aron-bordin/kivy,Cheaterman/kivy,cbenhagen/kivy,el-ethan/kivy,rnixx/kivy,arlowhite/kivy,kived/kivy,KeyWeeUsr/kivy,rafalo1333/kivy,inclement/kivy,cbenhagen/kivy,janssen/kivy,bionoid/kivy,arlowhite/kivy,manthansharma/kivy,vitorio/kivy,janssen/kivy,LogicalDash/kivy,autosportlabs/kivy,matham/kivy,andnovar/kivy,LogicalDash/kivy,autosportlabs/kivy,rafalo1333/kivy,jkankiewicz/kivy,manthansharma/kivy,kivy/kivy,jegger/kivy,darkopevec/kivy,akshayaurora/kivy,inclement/kivy,jegger/kivy,aron-bordin/kivy,KeyWeeUsr/kivy,kivy/kivy,tony/kivy,darkopevec/kivy,LogicalDash/kivy,jkankiewicz/kivy,tony/kivy,manthansharma/kivy,janssen/kivy,janssen/kivy,aron-bordin/kivy,bionoid/kivy