Fixing a trailing slash on an entry in /usr/local/rvm/bin:/usr/local/bin:/usr/local/sbin:/opt/local/bin:/opt/local/sbin:/Users/sboynton/.local.bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/usr/local/munki/:/Users/sboynton/android/SDK/platform-tools:/Users/sboynton/android/Utilities/dex2jar:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin:/usr/local/git/bin:/usr/local/munki:/usr/local/rvm/bin:/usr/local/sbin:/opt/local/bin:/opt/local/sbin:/Users/sboynton/.local.bin:/Users/sboynton/.rvm/bin