Don’t show the expand button for one line of code

[chasenlehara]

[I’m not sure if this is the right repo.]

Here’s an example:

It seems like we should not collapse the code when only one line needs to be collapsed. It should look like this:

[justinbmeyer]

The logic here gets a bit tricky. So we will show 3 lines, unless the 4th would eliminate a collapseable. But we wouldn’t do this for a 5th.