Proposal: New "ends" keyword

Here’s another challenge. How is this parsed?

class Foo
  def bar
    while true
      ends
        if foo
          while true
            ends

It is this one?

class Foo
  def bar
    while true
  ends

  if foo
    while true
ends

Or this one?

class Foo
  def bar
    while true
    ends

    if foo
      while true
ends