Add some whitespace for readability and extend comment. No functional changes.
Add some whitespace for readability and extend comment. No functional changes.

* subversion/libsvn_fs_fs/tree.c
  (locate_cache): Add whitespace. Document pool usage.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1604794 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion