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[3.11] gh-104018: disallow "z" format specifier in %-format of byte strings (GH-104033) (#104058)

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gh-104018: disallow "z" format specifier in %-format of byte strings (GH-104033)

PEP-0682 specified that %-formatting would not support the "z" specifier,
but it was unintentionally allowed for bytes. This PR makes use of the "z"
flag an error for %-formatting in a bytestring.

Issue: GH-104018

---------

(cherry picked from commit 3ed8c88290)

Co-authored-by: John Belmonte <john@neggie.net>
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
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Miss Islington (bot) 2023-05-01 13:18:29 -07:00 • committed by GitHub
parent 723aacb7d5
commit 10db28bfcf
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3 changed files with 3 additions and 1 deletions
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Objects/bytesobject.c
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@ -714,7 +714,6 @@ _PyBytes_FormatEx(const char *format, Py_ssize_t format_len,
case ' ': flags |= F_BLANK; continue;
case '#': flags |= F_ALT; continue;
case '0': flags |= F_ZERO; continue;
case 'z': flags |= F_NO_NEG_0; continue;
}
break;
}