Flowdock
scan() public

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# File lib/erb.rb, line 521
        def scan
          stag_reg = /(.*?)(^[ \t]*<%-|<%%|<%=|<%#|<%-|<%|\z)/
          etag_reg = /(.*?)(%%>|-%>|%>|\z)/
          scanner = StringScanner.new(@src)
          while ! scanner.eos?
            scanner.scan(@stag ? etag_reg : stag_reg)
            yield(scanner[1])

            elem = scanner[2]
            if /[ \t]*<%-/ =~ elem
              yield('<%')
            elsif elem == '-%>'
              yield('%>')
              yield(:cr) if scanner.scan(/(\n|\z)/)
            else
              yield(elem)
            end
          end
        end
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