Exercise sync, part 1

[colinleach]

Running configlet sync -u identified a few practice exercises that needed updating.

I added a template for Bob, but ran into errors when regenerating the tests: one of the string literals confuses the Julia parser.

ERROR: failed to parse input from /tmp/tmpe_xswoap: ParseError:
# Error @ line 86:38
    @testset "shouting with special characters" begin
        @test bob("""ZOMG THE %^*@#$(*^ ZOMBIES ARE COMING!!11!!1!""") == "Whoa, chill out!"
#                                    ╙ ── not a unary operator

A few potential workarounds failed, so I've marked that test as include = false in tests.toml.

Conversely, a few older tests were excluded for reasons that no longer seem relevant, so I removed the include = false lines.

Finally, I added .pyc files (from the generate_tests.py runs) to .gitignore.

This seems enough complexity for one PR, so I'll template and update connect, perfect-numbers and swift-scheduling separately

[github-actions]

This PR touches files which potentially affect the outcome of the tests of an exercise. This will cause all students' solutions to affected exercises to be re-tested.

If this PR does not affect the result of the test (or, for example, adds an edge case that is not worth rerunning all tests for), please add the following to the merge-commit message which will stops student's tests from re-running. Please copy-paste to avoid typos.

[no important files changed]

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[colinleach]

If you look at the old bob/runtests.jl, you'll see it creates all the tests as arrays at the top, then loops over them in testing. Very Julian (or very Sascha, for older test runner versions). Jeremy vocally hates this approach, so I replaced it with a more conventional linear test suite. We have quite a bit more of this we could do in the coming months, if you ever fancy a bit of gentle track housekeeping.

[depial]

LG2M!

The update you made for runtests.jl certainly makes a lot of sense for readability during troubleshooting, especially in the online editor.

[colinleach]

I didn't prevent retesting (1026 completions for Bob): mainly because I forgot, but also these are big changes to the tests.