Smartanswer: calculate your maternity pay - publishing

publishing last changes
yay! punctuation! :+1: If we are fixing those though, can we please fix all of them at once? (lines 86, 87, 180 have the same wrong-apostrophe-character issue). There also the fact that's also wrong in most of the other smart answers so probably one for @dsingleton to tell us if we should care or not?