basecurve: fix printf comments
(cherry picked from commit bad92cbe2fe5b4b12b5d7a02ccafd63dac667261)
basecurve: remove comments
basecurve: new olympus basecurve (inspired by junkyardsparkle)
(cherry picked from commit 60496bc836251764c735e1a8e34d7eeeec9363a5)