Add local fish config.

- Also update spacemacs for ruby.

fish/config.fish

@@ -8,6 +8,11 @@ set -g -x EDITOR "emacsclient"
 # Add ~/bin to PATH
 set -g -x PATH ~/bin $PATH
 
+# Machine-local config
+if test -e ~/.config/fish/local.fish
+  source ~/.config/fish/local.fish
+end
+
 # =========
 # Functions
 # =========