Argument deleted when option has same-valued argument

[Naoki Mizuno]

With the following snippet sample.rb,

#!/usr/bin/env ruby

require 'slop'

opts = Slop.parse do |o|
  o.integer '-t', 'Test'
end

puts opts.args

run with:

$ ./sample.rb 42 -t 42

no output is shown (when expected output is 42).

The culprit is this line.