README.md in rbpdf-1.20.1 vs README.md in rbpdf-1.21.0

@@ -1,6 +1,6 @@
-[![Build Status](https://travis-ci.org/naitoh/rbpdf.svg?branch=master)](https://travis-ci.org/naitoh/rbpdf)
+[![Build Status](https://github.com/naitoh/rbpdf/workflows/test/badge.svg)](https://github.com/naitoh/rbpdf/actions)
 
 # RBPDF Template Plugin
 
 A template plugin allowing the inclusion of ERB-enabled RBPDF template files.
 
@@ -55,9 +55,19 @@
   @pdf.set_margins(15, 27, 15)
   @pdf.set_font('kozminproregular','', 8)
   @pdf.add_page()
   @pdf.write(5, "UTF-8 Japanese text.\n", '')
 %><%==@pdf.output()%>
+```
+
+PDF example output
+```
+$ OUTPUT=true bundle exec rake test TEST=test/rbpdf_examples_test.rb
+$ ls -1 *.pdf
+example001.pdf
+example002.pdf
+example003.pdf
+:
 ```
 
 See the following files for sample of useage:
 
 test_unicode.rbpdf