Fix documentation of Fl_Input_::word_start() and word_end().

Documentation changes in svn r10383 (STR #3014) said that this would skip
"space-separated" words, which is not true.

Note: The set of word separators is currently not documented, it is
inconsistent with Fl_Text_Display/Fl_Text_Editor, and not UTF-8-aware.
Also, word selection and the above methods use different word delimiters.
This should be fixed in a later release (after 1.3.3).


git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10394 ea41ed52-d2ee-0310-a9c1-e6b18d33e121