keepp[atterns] causes vim-over to delete old search history items

[djjcast]

When you recall, type, or execute a substitution command with keepp[atterns], e.g. :keepp %s/foo/bar/g, vim-over deletes old search history items - keepp[atterns] prevents anything from being added to the search history.

It seems like these two calls to histdel() are causing the issue: 1 2