Right now, we have a problem with this diff.

Image a file:
```
line 1
line 2
``

and the diff changes it to
```
line 1
line 2_1
```

when the characters are streming in, let's say line 1 has already been streamed in. And now, line 2 is being streamed: `lin`

what would the diff look like? since we update char by char, we'll have

line 1 -> no chage
line 2 -> deleted
line 3 -> addition of `lin`

This makes a weird graphic effect where at the very bottom of the diff, you see a bunch of characters streaming in.

To fix this, we should only dispatch the diff when the newcode that's being streamed in adds a new line

So, let's say, line 1 begins streaming. We break newCode by newline and only send the code for lines that have full new lines.

When the code stops streaming, there might not be a new line at the end of it - that's fine, i will handle that case separately.

Fix this code to change this