Improve examples

@@ -20,7 +20,7 @@ import 'package:pdf/pdf.dart';
 import 'package:test/test.dart';
 
 void main() {
-  test('Pdf', () {
+  test('Pdf Annotations', () {
     final PdfDocument pdf = PdfDocument();
     final PdfPage page =
         PdfPage(pdf, pageFormat: const PdfPageFormat(500, 300));

@@ -51,7 +51,7 @@ class Color extends StatelessWidget {
 }
 
 void main() {
-  test('Pdf', () {
+  test('Pdf Colors', () {
     final Document pdf = Document(title: 'Material Colors');
 
     pdf.addPage(MultiPage(

@@ -23,7 +23,7 @@ import 'package:test/test.dart';
 import 'package:vector_math/vector_math_64.dart';
 
 void main() {
-  test('Pdf', () {
+  test('Pdf Complex', () {
     final Uint32List img = Uint32List(10 * 10);
     img.fillRange(0, img.length - 1, 0x12345678);
 

@@ -32,7 +32,7 @@ Future<Uint8List> download(String url) async {
 }
 
 void main() {
-  test('Pdf1', () async {
+  test('Pdf Jpeg', () async {
     final PdfDocument pdf = PdfDocument();
     final PdfPage page = PdfPage(pdf, pageFormat: PdfPageFormat.a4);
 

@@ -58,7 +58,7 @@ void printMetrics(
 }
 
 void main() {
-  test('Pdf', () {
+  test('Pdf Font Metrics', () {
     final Document pdf = Document();
 
     final File ttfFont = File('open-sans.ttf');

@@ -20,7 +20,7 @@ import 'package:pdf/pdf.dart';
 import 'package:test/test.dart';
 
 void main() {
-  test('Pdf1', () {
+  test('Pdf Minimal', () {
     final PdfDocument pdf = PdfDocument();
     final PdfPage page = PdfPage(pdf, pageFormat: PdfPageFormat.a4);
 

@@ -58,7 +58,7 @@ void printTextTtf(PdfGraphics canvas, String text, File ttfFont, double top) {
 }
 
 void main() {
-  test('Pdf', () {
+  test('Pdf TrueType', () {
     final PdfDocument pdf = PdfDocument();
     final PdfPage page =
         PdfPage(pdf, pageFormat: const PdfPageFormat(500, 300));

@@ -49,7 +49,7 @@ void printText(PdfGraphics canvas, String text, PdfFont font, double top) {
 }
 
 void main() {
-  test('Pdf', () {
+  test('Pdf Type1 Embedded Fonts', () {
     final PdfDocument pdf = PdfDocument();
     final PdfPage page =
         PdfPage(pdf, pageFormat: const PdfPageFormat(500, 430));

@@ -22,7 +22,7 @@ import 'package:pdf/widgets.dart';
 import 'package:test/test.dart';
 
 void main() {
-  test('Pdf', () {
+  test('Pdf Widgets', () {
     Document.debug = true;
 
     final Document pdf = Document(title: 'Widgets Test');

@@ -111,7 +111,7 @@ Future<PdfDocument> generateDocument(PdfPageFormat format) async {
       image: const fw.NetworkImage(
           'https://www.gravatar.com/avatar/00000000000000000000000000000000?d=mp&s=200'),
       onError: (dynamic exception, StackTrace stackTrace) {
-        print('error');
+        print('Unable to download image');
       });
 
   pdf.addPage(MyPage(

@@ -7,7 +7,7 @@ import 'package:pdf/pdf.dart';
 import 'package:printing_example/document.dart';
 
 void main() {
-  testWidgets('Generate the Pdf document', (WidgetTester tester) async {
+  testWidgets('Pdf Generate the document', (WidgetTester tester) async {
     final PdfDocument pdf = await generateDocument(PdfPageFormat.a4);
     final File file = File('document.pdf');
     file.writeAsBytesSync(pdf.save());