splits on spaces also considers \r\n\f\v\t as mandatory breaks
I'm still working on the strptokspn function
my goal is to use it directly rather than storing the matched char
and modifying the source string with \0 in order to tokenize the output
--Done
Change-Id: I7f378b5b9c4df8f10899b9a55a98950afb3931dc
