Add development notes

Run tests in parallel

Add all contributors cli

Add minitest for array.rb

Fix single hex digit escapes

Remove line breaks within block and lambda params

Why:
We would like for the array.rb file for the test snapshots to also be a
minitest test so th...

Align undef args like commands

Allow multiple undefs

Array literal comments

Properly support trailing commas with and without blocks

Better support for multi-line conditional predicate

Fix up spaces between next arguments

Handle destructuring arrays within parentheses

Fix regex whitespace issue

Support __END__ content

Fix the handling of invalid ruby

Add minitest for numbers

Add minitest for kwargs

Support inline lambdas better on commands

Handle cases with empty class and module declarations that need to break

Align print and sexp api

Escape patterns

Properly indent heredocs

Run prettier on ripper

Fix block comments

Switch over binary fixture to minitest

Handle trailing commas with block args

Split up method args