Autocorrection support for Sorbet signatures

[jaredbeck]

https://sorbet.org/docs/sigs

Input

class Foo
  # Comment b
  def b; end
  # Comment a
  sig { params(x: Integer).returns(String) }
  def a(x)
    x.to_s
  end
  alias_method :a2, :a
end

Output

class Foo
  # Comment a
  sig { params(x: Integer).returns(String) }
  def a(x)
    x.to_s
  end
  alias_method :a2, :a
  # Comment b
  def b; end
end

Fixes #3

[shanecav84]

Released in 0.9.