Previously, for a goal of N, N+1 words/lines/characters would be needed
to mark the goal as reached. If we're aiming for e.g. 750 words, then
*exactly 750 words* is, by definition, success. (And it's possible, even
if unlikely, that one would be not have further words to write.)
Unlike \w, \n is not a regexp special in elisp. Hence, with "\\n", the
regexp machinery strips the backslash (as it does with all unrecognized
specials), and we're actually counting the character 'n'. If we use "\n"
instead, that's a real newline character there, which is the right thing to