Make concatenation obvious for debugging.
Parenthesize alternation descriptions.
Extract the description of individual trees.
Bump Reducers.
Don’t quote arrays.
Compose strings with prefixes & suffixes.
Test null parse array description.

Test currently fails.
Use REDJoin to join parse trees.
Extract the description of parse forests.
Describe parse forests recursively.

This allows for prettier formatting of arrays in parse forests.
Fall back to -description for reduced parse trees.
Merge pull request #43 from robrix/descriptions

Descriptions