lib/danica/sum.rb in danica-2.0.6 vs lib/danica/sum.rb in danica-2.1.0

@@ -20,10 +20,10 @@
 
     alias_method :gnu_symbol, :tex_symbol
 
     def join_proc(symbol)
       proc do |_, value|
-        value.is_a?(Negative) ? ' ' : " #{symbol} "
+        value.is_a?(Negative) || value.is_a?(PositiveNegative) ? ' ' : " #{symbol} "
       end
     end
   end
 end