[docs] [issue31571] Redundand information on Doc/reference/lexical_analysis.rst

[Roundup Robot]

Changes by Roundup Robot <devnull at psf.upfronthosting.co.za>:


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keywords: +patch
pull_requests: +3741

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31571>
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