[Validator] avoid broken rendering of inline types in UniqueEntity
#20962
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This PR fixes a documentation issue where inline type annotations like
| string |
were not rendering correctly. This happened because reStructuredText interprets text enclosed in | (e.g.,|string|
) as a substitution reference, which requires a corresponding definition elsewhere in the document.Changes
Replaced ambiguous expressions like
| string |
with clearer wording such as: boolean, string, or array.Ensures consistent rendering across Sphinx and other reStructuredText parsers.
Why this matters
This change improves the readability of inline documentation and avoids confusion by using a format that renders correctly and doesn't unintentionally trigger reStructuredText substitution rules.