Fix loading of custom plugin completions.

functions/import.fish

@@ -38,6 +38,7 @@ function import -d "Load libraries, plugins, themes, etc."
     _prepend_tree $fish_path/$library     $skip_spec
     _prepend_tree $fish_custom/$library   $skip_spec
     _prepend_path $fish_path/$library/completions -d fish_complete_path
+    _prepend_path $fish_custom/$library/completions -d fish_complete_path
 
     # Set path to load files.
     set -l path $library/(basename $library).load

spec/import.spec.fish

@@ -37,6 +37,11 @@ function describe_import
     import plugins/git-flow
     expect $fish_complete_path --to-contain-all $fish_path/plugins/git-flow/completions
   end
+
+  function it_adds_completion_files_for_custom_plugins_to_completion_path
+    import plugins/example
+    expect $fish_complete_path --to-contain-all $fish_custom/plugins/example/completions
+  end
 end
 
 spec.run $argv