[Issue 17618] parse booktables manually to check whether symbols haven't been mentioned

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17618

--- Comment #1 from Seb <greensunny12 at gmail.com> ---
See also: https://github.com/dlang-community/D-Scanner/issues/494

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