tests/test-symlink-addremove.out

Improvement to 14ce129cfcd: Use try/except and pass filename on errors

Without the second part, the error message would be
  abort: Is a directory
instead of
  abort: Is a directory: /home/user/.cvspass

% directory moved and symlinked
adding foo/a
% now addremove should remove old files
adding bar/a
adding foo
removing foo/a