Liquid タグのコード整形・インデント

<div>
  {% liquid
    assign x = 1
    assign y = 2
    if A
      assign z = 1
    endif
  %}
</div>
<div>
  {%- liquid
    assign x = 1
    assign y = 2
    if A
      assign z = 1
    endif
  -%}
</div>

It should reindent and format
{%- liquid
  if empty and true
    render 'icon-cart-empty'
  else
    render 'icon-cart'
  endif
-%}

It should handle comments correctly
{%- liquid
  comment
    how u doin?
  endcomment
-%}

It should handle nested comments correctly
{%- liquid
  comment
    how u doin?
    comment
      ho
    endcomment
  endcomment
-%}

It should handle empty nested comments correctly
{%- liquid
  comment
    how u doin?
    comment
    endcomment
  endcomment
-%}

It should handle inline comments correctly
{%- liquid
  # heyy how u doin
  # not too bad
  #
  # you?
-%}

It should pretty print #### lines without a space
{%- liquid
  #############
  #     fancy
  #############
-%}

It should keep at most one empty new line between statements, and strip trailing
{% liquid
  # some reason
  if cond
    echo foo

    echo bar

  else
    echo bar
  endif

  # some other block
  case foo
    when bar, baz
      echo 'hi'

    else
      echo 'no'
  endcase
%}

It should parse tags properly and print them properly
printWidth: 1
{% liquid
  assign x = thing.property | filter1 | fitler2
  echo x | filter1 | filter2
  capture var
    if null
      echo true
    else
      echo false
    endif
  endcapture
  cycle 'one', 'two', 'three'

  for x in col reversed limit: 10
    echo x
  else
    echo 'nope'
  endfor

  form 'cart', cart
    echo 'huh?'
  endform

  increment i
  section 'string'
  layout 'string'

  paginate col by 10, window_size: 50
    render 'icon' with x as bar, foo: bar
  endpaginate
%}

It should keep newlines between tags
{% liquid
  # comment 1

  # comment 2
  if cond
    echo foo

    echo bar
  endif
%}

It should keep leading whitespace in comments
{% liquid
  # This list should not be reindented:
  #   - a
  #   - b
  #      - d
  #   - c
%}

It should not freak out on variable output characters inside conditions
{% liquid
  if shop.foo contains '{{cond}}'
    echo 'xxx'
  endif
%}