ex matched
either, then compare this <var>regex</var> (or regexes) against the
result of querying the <code>magic</code> database about the current
file, to determine whether this syntax should be used for it.
(This functionality only works when <code>libmagic</code> is installed
on the system and will be silently ignored otherwise.)
</p>
</dd>
<dt><code>formatter <var>program</var> [<var>argument</var> &hellip;]</code></dt>
<dd><p>Run the given <var>program</var> on the full contents of the current buffer.