turn 'runnableExample' into 'code-block' to make nightlies green
turn 'runnableExample' into 'code-block' to make nightlies green

This example doesn't work on our nightlies CI.
Other procs in this module already use 'code-block'.

dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim