 only be used after
  careful review to adapt them to your environment. The contents are as
  follows:</p>

  <dl>
    <dt>templates/hook/pre-commit</dt>

    <dd>
      This script restricts write-access to the repository by checking the
      following:

      <ul>
        <li>It executes the Subversion utility <code>svnperms.py</code> if it
        exists. This utility checks whether the author of the current
        transaction has enough permission to write to particular paths in the
        repository