ERB doesn't recognize -%> tag

Question

When I run this line:

ERB.new("<%= 'hi' %>").result

It works fine and I get this output: "hi"

But when I run this line:

ERB.new("<%= 'hi' -%>").result

I get this error:

SyntaxError: compile error
(erb):1: syntax error, unexpected ')'
_erbout = ''; _erbout.concat(( 'hi' -).to_s); _erbout

How can I fix this?

Answer 1

You need to set trim_mode parameter to '-':

ERB.new("<%= 'hi' -%>", nil, '-').result

If using CLI, set it via -T -:

erb -T - -r ./variables.rb template.erb