Put 'CACHE ERROR' in prompt when cache returns failure.

[cmarcusreid]

Follow-up from #755

This diff is a bit unfortunate; the only new bit is the leading if block. The rest was indented in the new else block.

[rkeithhill]

Fortunately, you can diff this in VSCode with the GitHub Pull Requests extension. And because VSCode diffs allow you to ignore whitespace, this diff simplifies to:

[cmarcusreid]

TIL! Thanks!

[rkeithhill]

I really wish GitHub would offer the option to ignore whitespace changes in diffs. This is one area where Bitbucket has a leg up on GH.

[rkeithhill]

Thanks for the PR! I've asked the other Keith to review it before merging it.

[dahlbyk]

Thanks for the fix, @cmarcusreid!

I really wish GitHub would offer the option to ignore whitespace changes in diffs. This is one area where Bitbucket has a leg up on GH.

You have been able to add ?w=1 for years, but it has been in the UI for a while, too.

[rkeithhill]

Thanks for pointing that out! That has been bugging me for a while. I was looking in the wrong place - in the ... menu to the right of the Viewed button.