TCL Question in ac3d.tcl

[jentron]

In the file tcl/ac3d.tcl there is a proc function called "foldbuttontoggle." At the apparent bottom of this proc there appears to be an umatched quote and some strange curly bracketing. Is this the way its supposed to be structured? TCL seems to accept it, but its breaking the syntax highlighting in notepad++

proc foldbuttontoggle { name } {

(snip)

	$foldcanvas configure -scrollregion " 0 0 100 $height }
	if { [ catch { set canvas $ac3d_version_revision } ] != 0 } {
	return 1
}