Style/RedundantReturn does not find redundant returns in conditional constructs preceded by other code

[buehmann]

I noticed that Style/RedundantReturn does not detect the redundant returns in code like

def func
  x = foo
  if x
    return 1
  else
    return 2
  end
end

but only if there is nothing preceding the if/case expression at the end of a method:

def func
  if x
    return 1
  else
    return 2
  end
end

redundant_return.rb:3:5: C: Style/RedundantReturn: Redundant return detected.
    return 1
    ^^^^^^
redundant_return.rb:5:5: C: Style/RedundantReturn: Redundant return detected.
    return 2
    ^^^^^^

(Example taken from #3590 where looking into conditionals was introduced.)

I am going to add a PR fixing this shortly.