change sexp operator names for clarity, make sure mprintfs have newlines, and fix typo

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9908 387891d4-d844-0410-90c0-e4c51a9137d3
better ranges are also good

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9909 387891d4-d844-0410-90c0-e4c51a9137d3