line 10 column 1 - Warning:
anchor "aBcDeF" already defined
Info: Doctype given is "-//W3C//DTD HTML 4.01 Transitional//EN"
Info: Document content looks like HTML 4.01 Strict
Tidy found 1 warning and 0 errors!
About HTML Tidy: https://github.com/htacg/tidy-html5
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https://github.com/htacg/tidy-html5/blob/master/README/LOCALIZE.md