Refactor the way how ls displays local variables

lib/pry/commands/ls/local_vars.rb

@@ -0,0 +1,37 @@
+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