Allow short for loops in macros

[sanks02]

At the moment, crystal tool format aligns multi-line code to the level of in:

{% for item in [
                 Something,
               ] %}
  {{p(item)}}
{% end %}

It becomes lengthy very quickly:

{% for array in [
                  [Something, "something", "@SOMETHING"],
                  [SomethingElse, "something_else", "@SOMETHING_ELSE"],
                  [SomethingElseElse, "something_else_else", "@SOMETHING_ELSE_ELSE"],
                ] %}
  {{p(array)}}
{% end %}

I would like to have a shorter version:

{% for array in [
  [Something, "something", "@SOMETHING"],
  [SomethingElse, "something_else", "@SOMETHING_ELSE"],
  [SomethingElseElse, "something_else_else", "@SOMETHING_ELSE_ELSE"],
] %}
  {{p(array)}}
{% end %}