Weird indentation of Ruby data in Sublime Text

sublime-text-ruby-indentation-bug.rb

# nested data usually auto-indents okay

x = {
  :A => {
    :a => 'a'
  }
}

# but a comma after a brace throws things off

y = {
  :A => {
    :a => 'a'
    },
    :B => {
      :b => 'b'
      },
      :C => {
        :c => 'c'
      }
    }

# when I was expecting:

y = {
  :A => {
    :a => 'a'
  },
  :B => {
    :b => 'b'
  },
  :C => {
    :c => 'c'
  }
}