Steps to produce:
- Open Code block editor
- Type in something for language that does not have any matches. (For example: adababa)
- Now click somewhere else to take the focus away from Language field
- Now again take your cursor back to the end of the language field and start deleting each character until there are some matching languages. (In this case: ada will have some matches)
Observe the drop down list for languages is appearing at the corner of the editor.