Backport PR #24229 on branch v3.6.x (FIX: do not mutate dictionaries passed in by user) - #24230

Backport PR #24229 on branch v3.6.x (FIX: do not mutate dictionaries passed in by user)#24230

QuLogic merged 1 commit into

matplotlib:v3.6.xmatplotlib/matplotlib:v3.6.xfrom

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