libpngpf(3) on macOS
The text f0ed76281f7c, as macOS 26.5, macOS 26.4, macOS 26.3, macOS 26.2, macOS 26.1, macOS 26.0, macOS 15.6, macOS 15.5, macOS 15.4 shipped it. The page shows this text now.
Portable Network Graphics (PNG) Reference Library 1.6.36 (private functions)