Fix svncopy.pl to handle externals pinned with -rX instead of -r X.
Fix svncopy.pl to handle externals pinned with -rX instead of -r X.

Patch by: Jacob Atzen <jacob@aub.dk>
(Tweaked by me.)

Approved by: djames

* contrib/client-side/svncopy.pl.in
  (UpdateExternalsOnDir): Change the external-matching regular
   expression so it matches revisions specified as "-rX".

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion