[bundler/bundler] Factor out gemspec call inside let

https://github.com/bundler/bundler/commit/ae0ac190aa

spec/bundler/commands/newgem_spec.rb

@@ -16,7 +16,7 @@ RSpec.describe "bundle gem" do
     expect(bundled_app("#{gem_name}/lib/test/gem/version.rb")).to exist
   end
 
-  let(:generated_gem) { Bundler::GemHelper.new(bundled_app(gem_name).to_s) }
+  let(:generated_gemspec) { Bundler::GemHelper.new(bundled_app(gem_name).to_s).gemspec }
 
   before do
     global_config "BUNDLE_GEM__MIT" => "false", "BUNDLE_GEM__TEST" => "false", "BUNDLE_GEM__COC" => "false"
@@ -41,22 +41,22 @@ RSpec.describe "bundle gem" do
   shared_examples_for "git config is present" do
     context "git config user.{name,email} present" do
       it "sets gemspec author to git user.name if available" do
-        expect(generated_gem.gemspec.authors.first).to eq("Bundler User")
+        expect(generated_gemspec.authors.first).to eq("Bundler User")
       end
 
       it "sets gemspec email to git user.email if available" do
-        expect(generated_gem.gemspec.email.first).to eq("user@example.com")
+        expect(generated_gemspec.email.first).to eq("user@example.com")
       end
     end
   end
 
   shared_examples_for "git config is absent" do
     it "sets gemspec author to default message if git user.name is not set or empty" do
-      expect(generated_gem.gemspec.authors.first).to eq("TODO: Write your name")
+      expect(generated_gemspec.authors.first).to eq("TODO: Write your name")
     end
 
     it "sets gemspec email to default message if git user.email is not set or empty" do
-      expect(generated_gem.gemspec.email.first).to eq("TODO: Write your email address")
+      expect(generated_gemspec.email.first).to eq("TODO: Write your email address")
     end
   end
 
@@ -270,7 +270,7 @@ RSpec.describe "bundle gem" do
     end
 
     it "sets gemspec metadata['allowed_push_host']" do
-      expect(generated_gem.gemspec.metadata["allowed_push_host"]).
+      expect(generated_gemspec.metadata["allowed_push_host"]).
         to match(/mygemserver\.com/)
     end
 
@@ -358,7 +358,7 @@ RSpec.describe "bundle gem" do
       end
 
       it "depends on a specific version of rspec" do
-        rspec_dep = generated_gem.gemspec.development_dependencies.find {|d| d.name == "rspec" }
+        rspec_dep = generated_gemspec.development_dependencies.find {|d| d.name == "rspec" }
         expect(rspec_dep).to be_specific
       end
 
@@ -405,7 +405,7 @@ RSpec.describe "bundle gem" do
       end
 
       it "depends on a specific version of minitest" do
-        rspec_dep = generated_gem.gemspec.development_dependencies.find {|d| d.name == "minitest" }
+        rspec_dep = generated_gemspec.development_dependencies.find {|d| d.name == "minitest" }
         expect(rspec_dep).to be_specific
       end