jacob1/The-Powder-Toy — comment on commit 58ee4af90a9c5a787b66b2727827ad3e9db4f2a0
File:  line 0
By jacob1:

I noticed that, I just wanted to test making it rotate like moving solids do, but then I realized it wouldn't work right and deleted all the code except for this, incase I wanted to try to use it for something else later. Also, Ctrl+Alt+[ or ] would have been fine with me to use for rotating the brush, that's what I was planning on doing.