Improved "other" error testing with error codename

[arduano]

Improved "other" error testing with error codename

This should allow easier testing of more obscure error cases. I might even replace other more rarely used errors with "other" because of this.

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• #131
• #130
• #129
• #128
• #127
• -> #132

[arduano]

@urbas pinging you here because I assume this is the first one you'll review:

If you want to merge these pull requests yourself, please avoid squashing. Each PR is automatically 1 descriptive commit, and it would be hard to properly squash these things.

Try to merge 1 PR at a time. Alternatively, you could probably just approve the PRs and let me figure out the merging process.

[arduano]

Was merged with a higher level PR