Update docs of ggit_tree_entry_get_file_mode
Update docs of ggit_tree_entry_get_file_mode

GNOME/libgit2-glib,weynhamz/GNOME-libgit2-glib,weynhamz/GNOME-libgit2-glib,chergert/libgit2-glib,GNOME/libgit2-glib,weynhamz/GNOME-libgit2-glib,weynhamz/GNOME-libgit2-glib,chergert/libgit2-glib,chergert/libgit2-glib