title: Is is safe to kill a Mercurial (hg) process?
body: <ul>
  <li><p>Which damage could be caused when killing a Mercurial process? Might the working directory be left in an undefined state? Might the .hg/-admin area get corrupted in some way?</p></li>
  <li><p>Are files written in some kind of "atomic" operation by Mercurial? (Working tree files, .hg/-internal files, configurations files, and so on ...)</p></li>
  </ul>