Clarify usage of the write/close deprecated APIs
Clarify usage of the write/close deprecated APIs

Saw some misconceptions in some client code; hopefully this clarifies things.

Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/590>

GNOME/librsvg,GNOME/librsvg,GNOME/librsvg,GNOME/librsvg