git-svn-id: https://jules.scsys.co.uk/repository/shadowcat-code/scratchpad/matthewt/sig/lib@2288
8a6f57db-631f-0410-b083-dc7c4259d016
< u____> this isnt even my final form
%
< Grinnz> ooh. PSGI as a make replacement
+%
+< skington> Except not ->subtract because that method doesn’t exist. Sorry.
+< skington> You can say ->add(months => -2) instead, though.
+< skington> Which is correct *and* looks wrong, so you know you’re in the
+ world of dates and times!