Tests:
Deleting when a selection starts in a blank line created by a block with a BR placeholder in it and extends to a character that is not at the end of a block. This ensures that some of our "special-case" code does not run for this case.
Expected Results:
Should see the two lines in the red box. Each should contain "A" only. Insertion point should be blinking at the start of the second line.

A

AA