revising branch to also inlude the short option

Now the -h and --help enact the same functionality as if help was called
on the subcommand.

Author: developingchris

lib/thor.rb

@@ -229,7 +229,7 @@ def subcommand(subcommand, subcommand_class)
 
       define_method(subcommand) do |*args|
         args, opts = Thor::Arguments.split(args)
-        args.unshift("help") if opts.include? "--help"
+        args.unshift("help") if opts.include? "--help" or opts.include? "-h"
         invoke subcommand_class, args, opts, :invoked_via_subcommand => true, :class_options => options
       end
     end

spec/subcommand_spec.rb

@@ -32,6 +32,12 @@
       expect(output).to eq(sub_help)
     end
 
+    it "accepts the help short switch and calls the help command on the subcommand" do
+      output = capture(:stdout) { TestSubcommands::Parent.start(%w[sub print_opt -h])}
+      sub_help = capture(:stdout) { TestSubcommands::Parent.start(%w[sub help print_opt])}
+      expect(output).to eq(sub_help)
+    end
+
   end
 
 end