Check whether another lib has implemented ruby 1.9 string interp syntax
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You may redistribute it and/or modify it under the same license terms as Ruby.
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=end
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if RUBY_VERSION < '1.9'
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if RUBY_VERSION < '1.9' && !"".respond_to?(:interpolate_without_ruby_19_syntax)
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# KeyError is raised by String#% when the string contains a named placeholder
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# that is not contained in the given arguments hash. Ruby 1.9 includes and
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