[3.14] gh-135648: Document that `shutil.copyfileobj` doesn't flush (GH-135737) (#135873)
Adds a note about flush/close on copyfileobj, and updates the Emscripten build script to follow documented advice. (cherry picked from commit 34393cbdd46fd965de86f1e7bc89ab111f506723) Co-authored-by: Russell Keith-Magee <russell@keith-magee.com>
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148f31f2d8301e7a4a2f4bc31c90432839c4e096
Parent: 7227aa4
Committed by GitHub <noreply@github.com>
on 6/24/2025, 1:22:07 AM