Documentation bug leading to 404 for unit tests

[s01ipsist]

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Problem

https://vector.dev/docs/reference/vrl/
has a malformed hyperlink in the text

When writing [unit tests](https://vector.dev/docs/reference/configuration//unit-tests)

due to a double slash in the path which causes a 404 when following the link.

The source link in https://github.com/vectordotdev/vector/blob/master/website/cue/reference/remap/concepts/assertions.cue#L13
uses the lookup from
https://github.com/vectordotdev/vector/blob/master/website/cue/reference/urls.cue#L631

vector_configuration ends in a / but vector_unit_tests also uses a slash to separate the components of "\(vector_configuration)/unit-tests"

There are many values in this file which use the /docs/reference/configuration path, but only vector_unit_tests tries to use the vector_configuration reference. Suggest that this is standardised to

vector_unit_tests:                          "/docs/reference/configuration/unit-tests"

for consistency and to fix the 404

Configuration

No response

Version

0.39.0

Debug Output

No response

Example Data

No response

Additional Context

No response

References

No response

[jszwedko]

Thanks! I opened #20819 to fix this.