[Backport 2.28] check_files.py: Allow specific Box Drawings characters to be used #6983
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Description
Currently,
check_files.py
enforces that Mbed TLS uses only valid UTF-8 and only other explicitly allowed characters. This PR adds three characters from the Box Drawings range to the list of allowed characters:u\2500
: “─”u\2514
: “└”u\251C
: “├”These characters are used to construct file trees in Markdown, like the one below. These can serve as useful visual aids.
This PR also changes the wording of how the allowed characters are explained using inclusive terminology.
Gatekeeper checklist