gh-140911: Ensure that UserString.rindex(), UserString.index() accept UserString as sub argument.
#140945
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XChaitanyaX
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UserString.rindex(), UserString.index() accept UserString as sub argument.UserString.rindex(), UserString.index() accept UserString as sub argument.
PredictiveManish
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Nov 12, 2025
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Add Closes: in description! so that it directly links to main issue (like below)
Add isinstance check to both methods index(), rindex()
Closes: #140911
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Add
isinstancecheck to both methodsindex(),rindex()collections.UserString.rindex()fails to acceptUserStringassubargument #140911