No functional change.

* subversion/libsvn_fs_fs/fs_fs.c
  (choose_delta_base): Document local variables.
  (get_shared_rep): Clarify docstring.  ("Hash" usually means apr_hash_t.)

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1491435 13f79535-47bb-0310-9956-ffa450edef68