I'm looking at legacy code that has all erb interpolations with <%== ... And I've never used that before.
What is it for? What does it do differently from <%= ?
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It's shorthand to output raw content.
see https://stackoverflow.com/a/5533614/2128691
<%== @content.body %>Is exactly the same as
<%= raw @content.body %>
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6+1. learned something new! – ddavison Sep 05 '13 at 15:24
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1Is there documentation for this shorthand? – Matt Sep 05 '13 at 15:25
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http://edgeguides.rubyonrails.org/active_support_core_extensions.html#output-safety (linked from OP Question comment) – dax Sep 05 '13 at 15:32