gh-110886 Doc: add a link to BNF Wikipedia article (#110887)

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
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partev 2023-10-15 12:52:13 -04:00 committed by GitHub
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@ -90,7 +90,8 @@ Notation
.. index:: BNF, grammar, syntax, notation
The descriptions of lexical analysis and syntax use a modified BNF grammar
The descriptions of lexical analysis and syntax use a modified
`BackusNaur form (BNF) <https://en.wikipedia.org/wiki/Backus%E2%80%93Naur_form>`_ grammar
notation. This uses the following style of definition:
.. productionlist:: notation