linuxmint/nemo — pull request #490 by bokic (2013-12-21 21:00:07+00:00)
Title: Allow extensions to create menu separators.

Allow extensions to create menu separators without modifying the API.

I have created patch that does that.

usage:
NautilusMenuItem *separator = nautilus_menu_item_new ("separator1", "-", "",
"");

PS. This patch was originally made for Nautilus, but I believe it should work with Nemo too.