Make sane backtrace in byebug

fix_byebug_backtrace.rb

Byebug::WhereCommand.class_eval do

  def get_backtrace
    (context.stack_size-1).downto(0).map do |index|
      hash = Byebug::Frame.new(context, index).to_hash

      path = hash[:file].gsub(Rails.root.to_s, '')
      next if path.match BACKTRACE_TRASH

      "#{hash[:mark]} #{path}:#{hash[:line]} #{hash[:call]}"
    end.compact
  end

  def print_backtrace
    print get_backtrace.join "\n"
  end

end