For what it's worth, I think there is a legitimate complaint here, though it was initially 
unclear to me exactly what that complaint was.  Consider the following:

>>> from textwrap import *
>>> T = TextWrapper(replace_whitespace=False, width=14)
>>> for line in T.wrap('one two\nthree four'): print line
... 
one two
three
four

The surprise (if I understand correctly) is not the first line break, but the second, between 
"three" and "four":  it shouldn't be necessary, since "three four" fits quite happily on a 
line of length 14.