`@email'{EMAIL-ADDRESS}
-----------------------

  Use the `@email' command to indicate an electronic mail address.  For
example:

     Send bug reports to <bug-texinfo@prep.ai.mit.edu>.

  In Info and TeX, this acts like `@samp'.  When we have support for
conversion of Texinfo to HTML, this will produce a link you can follow
to bring up a mail composition window initialized with EMAIL-ADDRESS.