Fix Map.fetch return value

[cshintov]

2 => {:ok, 2}

[github-actions]

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Automated comment created by PR Commenter 🤖.

[dabaer]

Thank you for the PR!

You can't update the /exercises/concept/*/.docs/introduction.md file directly as it is autogenerated from the files in /concepts/.

You'll need to run ./bin/fetch-configlet and ./bin/configlet --generate and commit the results.

[cshintov]

That's what I did!

I first edited concepts/structs/introduction.md and then did this:

You'll need to run ./bin/fetch-configlet and ./bin/configlet generate and commit the results.

[angelikatyborska]

Thank you 🙂 the same error appears in the file concepts/structs/about.md, could you fix it there too?

[cshintov]

Done.

I re-ran the configlet generate again. But it didn't have any effect this time.

[angelikatyborska]

That's correct, only introduction files are affected by the autogeneration. Thank you!