Fix mergeinfo --log to be consistent with log in printing a trailing separator.

* subversion/svn/cl-log.h
  (SVN_CL__LOG_SEP_STRING): New constant, moved from...

* subversion/svn/log-cmd.c
  (SEP_STRING): Removed
  (svn_cl__log_entry_receiver, svn_cl__log): Change to new constant.

* subversion/svn/mergeinfo-cmd.c
  (mergeinfo_log): Print a trailing separator when printing log details.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1548250 13f79535-47bb-0310-9956-ffa450edef68