Remove incorrect asset_path mapping

- Including 'asset_file' (the manifest) fails if asset file is itself
  templated (erb, coffee), or if asset file uses require_self.
- Use require_self if it is necessary to include javascript inside of a
  sprockets manifest file (like application.js)

lib/jasmine/asset_expander.rb

@@ -10,9 +10,8 @@ def expand(src_dir, src_path)
       bundled_asset = @bundled_asset_factory.call(pathname, 'js')
       return nil unless bundled_asset
 
-      base_asset = "#{bundled_asset.pathname.to_s.gsub(/#{src_dir}/, '')}?body=true"
-      bundled_asset.to_a.inject([base_asset]) do |assets, asset|
-        assets << "/#{@asset_path_for.call(asset).gsub(/^\//, '')}?body=true"
+      bundled_asset.to_a.map do |asset|
+        "/#{@asset_path_for.call(asset).gsub(/^\//, '')}?body=true"
       end.flatten
     end
   end

spec/asset_expander_spec.rb

@@ -22,8 +22,7 @@
 
     expander = Jasmine::AssetExpander.new(bundled_asset_getter, asset_path_getter)
     expanded_assets = expander.expand('/some_src_dir', 'asset_file')
-    expanded_assets.should == ['/asset_file?body=true',
-                               '/asset1_path?body=true',
+    expanded_assets.should == ['/asset1_path?body=true',
                                '/asset2_path?body=true']
   end