#1007: show diff between expected and actual in repl

[SebastianAas]

What has changed?

• Show diff on failed tests as describe in Have test runner show diff between "actual" and "expected" #1007
• The diff object is already present from cider-nrepl, so it only needs to be show. Mimicks format of cider-nrepl, which is based on humane-test-output

This is how the displayed diff will look in the repl:

Fixes #1007

My Calva PR Checklist

I have:

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Ping @PEZ, @bpringe, @corasaurus-hex, @Cyrik

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[PEZ]

Thanks! Can you check what the output looks like when using the "terminal" output destination? With some luck we have colored diffs there. 😄

[SebastianAas]

This is the output from the terminal:

Doesn't look like it has any colors for now.

Using test explorer:

[PEZ]

Thanks. We shouldn't be using clojure line comments there, but that's not introduced by your change. If you want to fix it, and also maybe look at if we can color code the diff for the terminal, that would be great!