Retiring Canned Examples?

Nobody has claimed this yet.

I don't quite know what the history of Canned Examples is, but by now, we have two ways of generating examples: either by outputtting them to a .out file, or by using `capture`. I think that should be enough to cover all cases. I philosophically dislike Canned Examples because they're hard-coded and because they're not mode-agnostic. About the latter point, what I mean is
(1) they look ugly in WebApp mode and
(2) they force us (well, me, really) to write ugly hacks in the handling of example output since `capture` produces examples in the current output mode (which I think is a good thing) whereas CannedExamples are always in standard mode. I will have to submit a PR anyway because https://github.com/Macaulay2/M2/commit/90960b09e1e841f8c643a91f1310b36edac90d46#commitcomment-46835042 broke `capture` in WebApp mode but I don't look forward to having to treat CannedExamples as well; originally when I rewrote `separateM2output` (the function that parses example output) I tried to make it as clean as possible and now it's kind of sloppy again.
So in conclusion I'm ready to go through the Core and check all CannedExamples and see if there's some way to replace them with normal examples. Suggestions of alternatives welcome.

Start by inspecting the Core's CannedExamples and the separateM2output function mentioned in the issue. Compare those paths with .out-file examples and capture, including their behavior in WebApp mode. Done means the CannedExamples cases have been reviewed and, where possible, replaced without breaking example output handling.

Written by the indexing model from the issue text.