Fixes typo in thor_spec.rb

Author: rthbound

spec/thor_spec.rb

@@ -214,7 +214,7 @@ def boring(*args)
         expect(capture(:stdout) { MyScript.start(["help"]) }).not_to match(/this is hidden/m)
       end
 
-      it "but the command is still invokcable not show the command in help" do
+      it "but the command is still invokable, does not show the command in help" do
         expect(MyScript.start(["hidden", "yesyes"])).to eq(["yesyes"])
       end
     end