Cleaning alphabet.py module  for Classical Arabic  (#583)
Cleaning alphabet.py module  for Classical Arabic  (#583)

* add pyarabic lib

* remove white spaces for the docs

* remove "u" from strings

TylerKirby/cltk,cltk/cltk,LBenzahia/cltk,kylepjohnson/cltk,D-K-E/cltk,diyclassics/cltk,LBenzahia/cltk,TylerKirby/cltk