Merge pull request #4034 from rubygems/improve_bundle_gem_gemspec_deps

Add commented out example and more information link to generated gemspec

bundler/lib/bundler/templates/newgem/newgem.gemspec.tt

@@ -35,4 +35,10 @@ Gem::Specification.new do |spec|
 <%- if config[:ext] -%>
   spec.extensions    = ["ext/<%= config[:underscored_name] %>/extconf.rb"]
 <%- end -%>
+
+  # Uncomment to register a new dependency of your gem
+  # spec.add_dependency "example-gem", "~> 1.0"
+
+  # For more information and examples about making a new gem, checkout our
+  # guide at: https://bundler.io/guides/creating_gem.html
 end