Parser testcases================ Format------ #data<css source data>#errors<list of expected errors, with line/col offsets> (ignored at present)#expected<rule list, as below>#reset Format of rule list-------------------   line     ::= rule | bytecode  rule     ::= '| ' type ' '+ name  name     ::= .+  type     ::= [0-9]+  bytecode ::= '|  ' ' '* hexnum (' '+ (hexnum | ptr))*  hexnum   ::= '0x' [0-9a-fA-F]+  ptr      ::= 'PTR(' .* ')' Type corresponds to css_rule_type. Consult the library sources for the values. Bytecode may be split over multiple lines for readability. All bytecode isassociated with the most-recently-declared rule. Consult the bytecodedocumentation for what the hexnums should be representing. Example------- #data* { color: #ff0000; background-image: url("foo.png"); }#errors#expected| 1 *|   0x0200000f 0xff000000|   0x02000003 PTR(foo.png)#reset TODO----   + Permit nesting of rules (for nested block support)