content_for タグ（レイアウトへのコンテンツ埋め込み）

It should never break a name
printWidth: 1
{% content_for 'block' %}
{%- content_for 'blocks' -%}

It should break on named args
printWidth: 1
{% content_for 'block',
  key1: val1,
  key2: (0..1)
%}

It should not require commas (as per syntax) but add them when pretty printed
{% content_for 'block', key1: val1, key2: (0..1) %}

It should not require spaces (as per syntax) but add them when pretty printed
{% content_for 'block', key1: val1, key2: (0..1) %}

It should strip trailing commas by default
{% content_for 'foo' %}
{% content_for 'foo', product: product %}