hexdump = """. a . v a l i d . s t r i n g . 
. a n o t h e r . s t r i n g . 
. e t c . . . . . . . . . . . . 
l i n e . w . a .   s p a c e . 
. e t c . . . . . . . . . . . . 
"""
Pyparsing: space as a valid token