><span class="r-pr">#&gt;</span> [1] "x is 7, x+1 is 8\n7 is odd is TRUE"</span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Because matching is done by a regular expression we</span></span></span>
<span class="r-in"><span><span class="co"># can not use arbitrary depths of nested parenthesis inside</span></span></span>
<span class="r-in"><span><span class="co"># the interpolation region.  The default regexp allows</span></span></span>
<span class="r-in"><span><span cl