Fix comment indentation in ASTNode#to_s

[FnControlOption]

require "compiler/crystal/syntax"

code = <<-CRYSTAL
class Foo
  # doc
  def bar
  end
end
CRYSTAL

parser = Crystal::Parser.new(code)
parser.wants_doc = true

ast = parser.parse

puts String.build { |io| ast.to_s(io, emit_doc: true) }

Old output:

class Foo
    # doc
def bar
  end
end

New output:

class Foo
  # doc
  def bar
  end
end

[beta-ziliani]

🚀