help help --help to help

lib/pry/command_set.rb

@@ -331,8 +331,26 @@ class Pry
 
     def define_default_commands
 
-      command "help", "This menu." do |cmd|
-        if !cmd
+      create_command "help" do |cmd|
+        description "Show a list of commands, or help for one command"
+
+        banner <<-BANNER
+          Usage: help [ COMMAND ]
+
+          With no arguments, help lists all the available commands in the current
+          command-set along with their description.
+
+          When given a command name as an argument, shows the help for that command.
+        BANNER
+
+        def process
+          if cmd = args.first
+            if command = find_command(cmd)
+              output.puts command.new.help
+            else
+              output.puts "No info for command: #{cmd}"
+            end
+          else
             output.puts
             help_text = heading("Command List: ") + "\n"
 
@@ -343,11 +361,6 @@ class Pry
             end.compact.sort.join("\n")
 
             stagger_output(help_text)
-        else
-          if command = find_command(cmd)
-            output.puts command.new.help
-          else
-            output.puts "No info for command: #{cmd}"
           end
         end
       end