Refactor the way how ls displays local names

lib/pry/commands/ls/local_names.rb

@@ -0,0 +1,33 @@
+class Pry
+  class Command::Ls < Pry::ClassCommand
+    class LocalNames < Pry::Command::Ls::Formatter
+
+      def initialize(target, has_any_opts, sticky_locals, args)
+        super(target)
+        @has_any_opts = has_any_opts
+        @sticky_locals = sticky_locals
+        @args = args
+      end
+
+      def correct_opts?
+        super || !@has_any_opts && @args.empty?
+      end
+
+      def output_self
+        local_vars = grep.regexp[@target.eval('local_variables')]
+        output_section('locals', format(local_vars))
+      end
+
+      def format(locals)
+        locals.sort_by(&:downcase).map do |name|
+          if @sticky_locals.include?(name.to_sym)
+            color(:pry_var, name)
+          else
+            color(:local_var, name)
+          end
+        end
+      end
+
+    end
+  end
+end