Fix import not getting passed the correct passed in `oh-my-fish.fish`.

To import plugins or load themes:

 + import plugins/<plugin>
 + import plugins/{dpaste,cask} themes/bobthefish

Note: Plugins/Themes can be in either `custom/plugins`, `custom/themes` or `$fish_path/plugins/`, `$fish_path/themes/`.

functions/_prepend_tree.fish

@@ -91,8 +91,8 @@ function _prepend_tree -d "Add a dependency tree to the Fish path."
 
   # Traverse $path and $subs prepending only directories with matches.
   for dir in $path $subs
-    # Use head to retrieve at least one match. Ignore errors for non
-    # existing directories
+    # Use head to retrieve at least one match. Skip not found errors
+    # for directories that do not exist.
     if [ -z (find "$dir" $glob -maxdepth 1 ^/dev/null | head -1) ]
       continue
     end

functions/import.fish

@@ -15,7 +15,8 @@
 #      in ~/.config/fish/config.fish
 #
 # EXAMPLES
-#      import dpaste cask themes/bobthefish
+#      import plugins/<plugin>
+#      import plugins/{dpaste,cask} themes/bobthefish
 #
 # AUTHORS
 #      Jorge Bucaran <jbucaran@me.com>

oh-my-fish.fish

@@ -20,7 +20,7 @@ end
 # a directory under $fish_path/custom/themes with the same name as
 # the theme and override any functions/variables there. Rinse and
 # repeat for plugins.
-import $fish_plugins themes/$fish_theme
+import plugins/$fish_plugins themes/$fish_theme
 
 # Source all files inside custom directory.
 for load in $fish_custom/*.load