Error with inline spacer templates when rendering collections...

Hi,

I'm trying to render a collection of objects, and use an inline spacer
template to separate them:

  render :partial => "tag", :collection => @tags, :spacer_template =>
{ :inline => " " }

(I just want to seperate them with a space for now.)
But I get the following error:

  No rhtml, rxml, rjs or delegate template found for post/_inline

If I try this:

  render :partial => "tag", :collection => @tags, :spacer_template =>
{ :inline => "<%= ' ' -%>" }

I get the following error:

compile error
script/../config/../app/views/post/about.rhtml:48: parse error,
unexpected $undefined., expecting '}'
  render :partial => "tag", :collection => @tags, :spacer_template =>
{ :inline => "<%= ' ' ).to_s); _erbout.concat "\" }\n"

                                               ^
script/../config/../app/views/post/about.rhtml:60: parse error,
unexpected $, expecting ')'

I'm baffled. What am I doing wrong?

Thanks,
  Brad