Unfortunately, that doesn't work.
The following is the output that I recieved:

| grammar  |Trying rule: [grammar]                |
| grammar  |                                      |"TestDirective
|          |                                      |"true"\nNoValDirect
+ive
|          |                                      |"test"\n"
| grammar  |Trying production: [line /\z/]        |
| grammar  |Trying repeated subrule: [line]       |
|   line   |Trying rule: [line]                   |
|   line   |Trying production: []                 |
|   line   |>>Matched production: []<<            |
|   line   |>>Matched rule<< (return value:       |
|          |[line])                               |
|   line   |(consumed: [])                        |
| grammar  |>>Matched repeated subrule: [line]<<  |
|          |(1 times)                             |
| grammar  |Trying terminal: [/\z/]               |
| grammar  |<<Didn't match terminal>>             |
| grammar  |<<Didn't match rule>>                 |
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Note: Sorry for the formatting it just doesn't translate well