Comment fixes. No functional change.

* subversion/libsvn_subr/eol.c
  (svn_eol__find_eol_start): fix typos and wording in comments;
                             remove obsolete docstring


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1485493 13f79535-47bb-0310-9956-ffa450edef68
We frequently check relative paths for being canonical.  Speed that up
by minimizing the number of conditional jumps on the hot path.

* subversion/libsvn_subr/dirent_uri.c
  (relpath_is_canonical): minimize number of conditions in while() loop


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1485496 13f79535-47bb-0310-9956-ffa450edef68