Subversion ignore commands drive me up the wall. Git’s ignore is much easier to use, and consistent.
Here is the process I followed to add svn:ignore to a newly added directory that hadn’t yet been committed to the SVN repo. The magic here is the “-N” flag on the add command, since that stops the recursive add (which would add the git directories), and you can then set svn:ignore afterwards.
svn add active_scaffold_list_filters/ -N svn ps svn:ignore ".git" active_scaffold_list_filters/ svn add active_scaffold_list_filters/* svn ci