From NEWS file (version 3.1.7):
* fixed compilation bugs in MacOsX systems (thanks to
Trevor Spiteri)
* language definition for Lilypond (thanks to Federico Bruni)
* language definition for R statistics programming language
* language definition for ISLISP (thanks to Christian Jullien)
* improved Erlang definition file (thanks to Erik Søe Sørensen)
* new output format: ESC 256 ascii code (thanks to
Xavier-Emmanuel Vincent).
(It still needs boost 1.53 for all tests to pass.)