Initialized merge tracking via "svnmerge" with revisions "1-51333" from
svn+ssh://pythondev@svn.python.org/python/trunk/Modules/_ctypes


(This had to be done with the command line:

  svnmerge init -r 1:51333 -F c:\svn\trunk\Modules\_ctypes

because svnmerge isn't able to deduce the branch point r51333 and the
HEAD URL automatically in a subdirectory.)