Re-enable automatic chruby-ing

runcoms/zshenv

@@ -13,7 +13,7 @@ fi
 if command -v brew &> /dev/null; then
   if [[ -s `brew --prefix`/share/chruby/chruby.sh ]]; then
     source `brew --prefix`/share/chruby/chruby.sh
-    # source `brew --prefix`/share/chruby/auto.sh
+    source `brew --prefix`/share/chruby/auto.sh
     chruby ruby
   fi
 fi