yyuu/pyenv — pull request #88 by pwdtnx (2013-12-12 13:22:01+00:00)
Title: Fix pyenv-prefix to trim "/bin" in `pyenv prefix system`

We have '/bin' at the end of a result of pyenv-prefix with 'system', such as '/usr/local/bin'.
It is inconsistent with a return value of the command with a specific version, such as '.../.pyenv/versions/3.3.x'.