Merge pull request #16 from Gaelan/patch-1

Fix grammar in Guardfile template.

Author: rymai

lib/guard/bundler/templates/Guardfile

@@ -1,5 +1,5 @@
 guard 'bundler' do
   watch('Gemfile')
-  # Uncomment next line if Gemfile contain `gemspec' command
+  # Uncomment next line if your Gemfile contains the `gemspec' command.
   # watch(/^.+\.gemspec/)
 end