ts ::= ws Ts ws => ts
Ts ::= Test*
ws !::= w*
-Test ::= ^"testcase" "{" Input Output+ Grammar "}"
+Test ::= ^"testcase" "{" Input output+ Grammar "}"
| ^"testcase" "{" Input Grammar "}"
-Output ::= "output" quoted ";"
+output ::= "output" quoted ";" / w*
Input ::= "input" quoted ";"