[Ruby] fix ruby test, update error message (#4041)

* fix ruby test, update error message

* use block

* update template for api client spec

* update test files

Author: wing328

modules/openapi-generator/src/main/resources/ruby-client/api_client_spec.mustache

@@ -150,7 +150,7 @@ describe {{moduleName}}::ApiClient do
     end
 
     it 'fails for invalid collection format' do
-      expect(proc { api_client.build_collection_param(param, :INVALID) }).to raise_error(RuntimeError, 'unknown collection format: :INVALID')
+      expect{api_client.build_collection_param(param, :INVALID)}.to raise_error(RuntimeError, 'unknown collection format: :INVALID')
     end
   end
 

samples/client/petstore/ruby/spec/api_client_spec.rb

@@ -156,7 +156,7 @@
     end
 
     it 'fails for invalid collection format' do
-      expect(proc { api_client.build_collection_param(param, :INVALID) }).to raise_error(RuntimeError, 'unknown collection format: :INVALID')
+      expect{api_client.build_collection_param(param, :INVALID)}.to raise_error(RuntimeError, 'unknown collection format: :INVALID')
     end
   end
 

samples/openapi3/client/petstore/ruby-faraday/spec/api_client_spec.rb

@@ -118,7 +118,7 @@
     end
 
     it 'fails for invalid collection format' do
-      expect(proc { api_client.build_collection_param(param, :INVALID) }).to raise_error(RuntimeError, 'unknown collection format: :INVALID')
+      expect{api_client.build_collection_param(param, :INVALID)}.to raise_error(RuntimeError, 'unknown collection format: :INVALID')
     end
   end
 

samples/openapi3/client/petstore/ruby/spec/api_client_spec.rb

@@ -156,7 +156,7 @@
     end
 
     it 'fails for invalid collection format' do
-      expect(proc { api_client.build_collection_param(param, :INVALID) }).to raise_error(RuntimeError, 'unknown collection format: :INVALID')
+      expect{api_client.build_collection_param(param, :INVALID)}.to raise_error(RuntimeError, 'unknown collection format: :INVALID')
     end
   end