Merge pull request #135 from tomeon/asset-file-copying-permissions

Avoid "permission denied" errors copying assets

closes #133, closes #134

Author: amatsuda

lib/simplecov-html.rb

@@ -27,7 +27,7 @@ def initialize
       def format(result)
         unless @inline_assets
           Dir[File.join(@public_assets_dir, "*")].each do |path|
-            FileUtils.cp_r(path, asset_output_path)
+            FileUtils.cp_r(path, asset_output_path, remove_destination: true)
           end
         end