fix syntax error

Author: AbanoubGhadban

spec/dummy/spec/packs_generator_spec.rb

@@ -82,7 +82,7 @@ module ReactOnRails
       it "generated pack for ComponentWithCommonOnly uses common file for pack" do
         pack_content = File.read(component_pack)
 
-        expect(pack_content).to include("#{component_name / dummy / spec / packs_generator_spec.rbe}.jsx")
+        expect(pack_content).to include("#{component_name}.jsx")
         expect(pack_content).not_to include("#{component_name}.client.jsx")
         expect(pack_content).not_to include("#{component_name}.server.jsx")
       end

spec/react_on_rails/packer_utils_spec.rb

@@ -44,7 +44,7 @@ module ReactOnRails
         before do
           allow(described_class.packer).to receive(:dev_server).and_return(
             instance_double(
-              (ReactOnRails::PackerUtils.packer)::DevServer,
+              ReactOnRails::PackerUtils.packer::DevServer,
               running?: true,
               protocol: "http",
               host_with_port: "localhost:3035"