uot;) may be used to group arguments in different ways. If an argument field begins with a left brace, then the argument is not terminated by white space; it ends at the matching right brace. Tcl will strip off the outermost layer of braces before passing the argument to the command. For example, in the command:</P>
<PRE>var a {b c}</PRE>
<P>
the <CODE>
var</CODE>
 command will receive two arguments: <CODE>
a</CODE>
 and<CODE>
 b  c</CODE>
. The matching right brace need not be on the same line as the left 