* WorkingTreeIterator#idSubmodule: Refactor to open Repository in try-with-resource
* UploadPack: Suppress resource warning about PackWriter
* ShowPackDelta: Refactor to use try-with-resource
* SubmoduleWalk#forIndex: Suppress resource warning and update Javadoc
* SubmoduleWalk: Open Repository in try-with-resource
* RepositoryFilter: Refactor doFilter to open Repository in try-with-resource