Add bin and edit workflow

bin/gems/kramdown-parser-gfm-1.1.0/test/testcases/codeblock_fenced.text

@@ -0,0 +1,21 @@
+normal
+
+```ruby
+require 'kramdown'
+
+Kramdown::Document.new(text).to_html
+```
+
+indent with tab
+
+	```ruby
+	require 'kramdown'
+
+	Kramdown::Document.new(text).to_html
+	```
+
+indent with 2 spaces
+
+  ```js
+  console.log("hello");
+  ```