Found while verifying #676.

Ensure auto activation is enabled and type: (1..2).ea. Code assist will be shown and will list each and eachWithIndex. While code assist suggestion list is open, hit Ctrl+Space to cycle through proposals. Otherwise, close the suggestion list and hit ctrl+space: a new suggestion list is shown, including, for instance, forEach.
It seems like that when auto-activation occurs, the range is evaluated as Object, while after you call code assist "manually", it's evaluated as Iterable, hence giving additional proposals.