message: docs: remove extra closing </div> tag
  I wasn't able to reproduce the exact formatting issues seen on docs.rs
  locally, though from some source inspection, this extra `</div>` appears
  to be the culprit.
  (hopefully) fixes
diff: //! <pre class="ignore" style="white-space:normal;font:inherit;">
  //! <strong>Note</strong>: <code>tracing</code>'s <code>no_std</code> support
  //! requires <code>liballoc</code>.
  -//! </div>
  //! </pre></div>
  //!
  //! [`log`]: https://docs.rs/log/0.4.6/log/
  