perl -pi -e 's/ (\d{4}-)?(2016)(?= Free Software)/
               " ".($1||"$2-").($2+1)/e' **/*(^/)
under zsh, reverting the tools/mbench directory (not distributed with
MPFR). Removed 2016 from the example in the doc/README.dev file.

[From SVN r11117 (trunk)]