 a testtmp.val</PRE>
<P>
If a field is enclosed in braces then the brackets and the characters between them are not interpreted specially; they are passed through to the argument verbatim.</P>


<H2 CLASS="HeadingC">
Variable Substitution</H2>
<P>
<A NAME="IX_Dollar sign:in Tcl">
 </A>
<A NAME="IX_$:in Tcl">
 </A>
The dollar sign ($) may be used as a special shorthand form for substituting variables. If $ appears in an argument that is not enclosed in braces then variable substitution will occur. The charac