[rubygems/rubygems] Actually run "generating a gem" shared examples for the more standard name

They were only being run for "edge case" names, yet it tests all kind of
things about generation.

3e9d805eea

spec/bundler/commands/newgem_spec.rb

@@ -37,6 +37,8 @@ RSpec.describe "bundle gem" do
 
   let(:require_path) { "mygem" }
 
+  let(:require_relative_path) { "mygem" }
+
   let(:minitest_test_file_path) { "test/test_mygem.rb" }
 
   let(:minitest_test_class_name) { "class TestMygem < Minitest::Test" }
@@ -1500,6 +1502,8 @@ RSpec.describe "bundle gem" do
     end
   end
 
+  include_examples "generating a gem"
+
   context "testing --mit and --coc options against bundle config settings" do
     let(:gem_name) { "test-gem" }