Fix typo in POD generation of parserCheckboxList.pl

Author: somiaj

macros/parsers/parserCheckboxList.pl

@@ -158,6 +158,7 @@ =head1 DESCRIPTION
 the literal correct answer, not an index to it.  Default: 0
 
 =item C<S<< showInStatic => 0 or 1 >>>
+
 In static output, such as PDF or PTX, this controls whether or not
 the list of answer options is displayed.  (The text preceding the list
 of answer options might make printing the answer option list