[orca-list] Issue with new terminal script from master

[Nolan Darilek <nolan thewordnerd info>]

I recently upgraded to master from 3.20, and since the latter includes 
the new terminal script, I suspect it is causing this. Steps to reproduce:


1. Launch vim (I'm using nvim here but it may also happen with vim.)

2. Press "a" to append text.

3. Type "This is a test."


Expected result: Orca speaks "T", "h", "i", ...

Actual: Orca speaks "T", "th", "thi", "this", "this ", "this i", ...


Thanks.