gh-86463: Fix default prog in subparsers if usage is used in the parent parser #124532
+61
−9
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The placeholder '...' is now used as the prog prefix in subparsers if a custom usage is specified in the parent parser and prog is not specified in the subparser.
Previously the full custom usage of the parent parser was used as the prog prefix in subparsers.
📚 Documentation preview 📚: https://cpython-previews--124532.org.readthedocs.build/