Refactor the way how `ls` displays local variables
user
```ruby
class Pry
  class Command::Ls < Pry::ClassCommand
    class LocalVars < Pry::Command::Ls::Formatter

      def initialize(target, sticky_locals, opts)
        super(target)
        @sticky_locals = sticky_locals
        @default_switch = opts[:locals]
      end

      def output_self
        name_value_pairs = @target.eval('local_variables').reject { |e|
          @sticky_locals.keys.include?(e.to_sym)
        }.map { |name|
          [name, (@target.eval(name.to_s))]
        }
        format(name_value_pairs).join('')
      end

      def format(name_value_pairs)
        name_value_pairs.sort_by { |name, value|
          value.to_s.size
        }.reverse.map { |name, value|
          colorized_assignment_style(name, format_value(value))
        }
      end

      def colorized_assignment_style(lhs, rhs, desired_width = 7)
        colorized_lhs = color(:local_var, lhs)
        color_escape_padding = colorized_lhs.size - lhs.size
        pad = desired_width + color_escape_padding
        "%-#{pad}s = %s" % [color(:local_var, colorized_lhs), rhs]
      end

    end
  end
end
```
assistant