chore: cleaned up

Author: gibahjoe

openapi-generator/test/test_annotations/test_configs.dart

@@ -42,7 +42,6 @@ const updateAnnotatedFile = true;
 class TestClassHasCustomAnnotations {}
 
 @ShouldGenerate(r'''
-
 const additionalProperties = wrapper = 'flutterw', nullableFields = 'true';
 
 const fetchDependencies = true;
@@ -56,7 +55,6 @@ const runSourceGenOnOutput = true;
 const skipSpecValidation = false;
 
 const updateAnnotatedFile = true;
-
 ''')
 @Openapi(
   inputSpec: InputSpec(path: ''),

openapi-generator/test/test_annotations/test_generator.dart

@@ -12,7 +12,7 @@ class TestGenerator extends src_gen.GeneratorForAnnotation<Openapi> {
   @override
   Iterable<String> generateForAnnotatedElement(Element element,
       src_gen.ConstantReader annotation, BuildStep buildStep) sync* {
-    assert(!annotation.isNull, 'The source generator should\'nt be null');
+    assert(!annotation.isNull, "The source generator shouldn't be null");
 
     if (element is! ClassElement) {
       throw src_gen.InvalidGenerationSourceError(