[docs] [issue13790] In str.format an incorrect error message for list, tuple, dict, set

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

Doc patch attached to make sure correct. Should {} be quoted?

Eric, do you want to close off the idea of changing :d errors, or switch back after the doc fix?

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keywords: +patch
nosy: +terry.reedy
stage:  -> test needed
Added file: http://bugs.python.org/file24287/i13790.diff

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