Maintain vertical alignment of 'svn status' output with up to 8-digit
revision numbers being shown, when '-v' and/or '-u' options are used.
Previously the output would only remain aligned up to 6 digits; two spare
blank columns were visible but not used.

* subversion/svn/status.c
  (print_status): Allow revision numbers to use all of the existing space.

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1428637 13f79535-47bb-0310-9956-ffa450edef68