Don't include added delimiters in "that" mark

[pokey]

The problem

In the following file

hello
world

Calling the following two commands

1. "bring line harp to after whale"
2. "indent that"

Results in the following

hello
    world
    hello

It should be

hello
world
    hello

• While we're here, make that mark be list of targets without delimiters when we do auto-joining of multiple "bring" sources
• While we're here, implement Selection migration for "bring" / "move" #527?

The solution

We add support in our selection update tracker code for updating the range for an edit, so that the client can determine the final range of their edit range, after the edits are applied. The "bring" code will then make it so that each insertion which is not a delimiter is tracked, and set the "that" mark to the list of these insertions.

• Also highlight just these insertions rather than highlighting the delimiters

[pokey]

I believe we could fix this issue and #185 by not including the added delimiter in the "that" mark when using "bring to after". Does that seem like reasonable behaviour?

At some point we might want to make it so that the "that" mark includes both an inside and outside range, but I think the above is a reasonable place to start that I believe should be not too bad to implement