Revert "Fixes #208: Updated documentation for using regexp to test exceptions."

This reverts commit d75db4604974a02efd8d2157195ee8003f35258b.
Revert "[ja] Sync with d75db4604974a02efd8d2157195ee8003f35258b"

This reverts commit 8041eb1892fe58ca81455b749b6244668df347cf.
Fix #226: Document `@backupStaticAttributes` caveats.