[docs] [issue32263] Template string docs refer to "normal %-based substitutions"

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

We can remove the word "normal" but otherwise the docs read fairly well.

FWIW, when there docs were written, the {} new-style string formatting didn't exist, so the wording was reasonable at the time.

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assignee: docs at python -> rhettinger
nosy: +rhettinger

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