ruby - In Rails 2 yielding a block in a helper a method renders partial? -

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rails 2.2.2

_competition.html.erb

<p>this packed</p> <% pack %> // javascript <% end %>

competitions_helper.rb

def pack(&block)   yield + 'packed' end

however 'packed' not appended javascript string, if pack do has no effect. seems there oddness going off context of blocks , actual view rendering because if remove call yield in helper , return hard coded string no output pack.

def pack(&block)   concat(capture(&block) + 'packed') end

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