gh-90102: Fix pyio _isatty_open_only() (#125089)

Spotted by @ngnpope.

`isatty` returns False to indicate the file is not a TTY. The C
implementation of _io does that (`Py_RETURN_FALSE`) but I got the
bool backwards in the _pyio implementaiton.

Cody Maloney committed 1y ago

43ad3b51707f51ae4b434e2b5950d2c8bf7cca6e

Parent: e4292c0

Committed by GitHub <noreply@github.com> on 10/8/2024, 11:49:50 AM