gio: fix GFile doc indentation and nullable annotations

Add missing (nullable), and use 2-space indentation to avoid markdown
pre-formatted blocks when unwanted.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
This commit is contained in:
Marc-André Lureau 2021-10-25 15:24:15 +04:00 committed by Philip Withnall
parent 3a6e8bc887
commit b26855579c

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