So is the --title option for the collection title of for the input article title?
It's for the title of the book generated by the bundler. The title of the article you wish to render should just follow all the other options. So...
node bin/mw-ocg-bundler -o bundle.zip --prefix he "ASCII"
Or...
node bin/mw-ocg-bundler -o bundle.zip --prefix he --title "My Awesome Book About Code Formats" "ASCII"