ruby on rails - Why isn't #truncate including the given block as in the example? -

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according documentation, #truncate can accept block, not including it!

http://api.rubyonrails.org/classes/actionview/helpers/texthelper.html#method-i-truncate

2.0.0p247 :310 > helper.truncate("once upon time in world far far away") { link_to "continue", "#" }  => "once upon time in world..."

how include block truncate?

rails 3.2.14.

i think block part new in rails 4.0.

http://apidock.com/rails/v3.2.13/actionview/helpers/texthelper/truncate

it looks sort of thing

helper.truncate("once upon time in world far far away", :omission => link_to("continue", "#"))

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