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It is not a feature of PdfTeX, Igor, nor is it related to whether or
not DVI/PDF output is selected -- exactly the same behaviour is
manifested by the following, independent of engine, etc.<br>
<br>
<tt>
</tt>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
margin-right:0px; -qt-block-indent:0; text-indent:0px;"><tt>\iffalse</tt></p>
<tt>
</tt>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
margin-right:0px; -qt-block-indent:0; text-indent:0px;"><tt>
\def \a #1#2{\myif #1\else #2\fi}</tt></p>
<tt>
</tt>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
margin-right:0px; -qt-block-indent:0; text-indent:0px;"><tt>\fi</tt></p>
<tt>
</tt>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
margin-right:0px; -qt-block-indent:0; text-indent:0px;"><tt>\end</tt></p>
-- <br>
<div class="moz-signature"><img
src="cid:part1.824E5B82.6AAD8986@Rhul.Ac.Uk"><br>
Philip Taylor</div>
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