Undo does not work with [ENTER]

[salamander2]

If you already know about this bug with undo [CTRL-Z] just ignore it, close it.

1. Type: I am going to the store
2. Make these changes: I am going to the bank[ENTER] and the store
3. The text now looks like this: I am going to the bank
and the store.
4. Press [CTRL-Z] repeatedly to undo the changes made in step 2.
5. The letters typed will be removed, BUT NOT THE [ENTER] / newline
6. When you undo everything, the text looks like this: I am going to
the store.

It should be back to one line if the undo was working perfectly. Instead, we're left with two lines.