@@ -124,7 +124,7 @@ valueToJs = fromMaybe (error "Incomplete pattern") . pattern matchValue
124124 , [ binary Multiply "*" ]
125125 , [ binary Divide "/" ]
126126 , [ binary Modulus "%" ]
127− , [ binary Concat "++" ]
127+ , [ binary Concat "+" ]
128128 , [ binary Add "+" ]
129129 , [ binary Subtract "-" ]
130130 , [ binary ShiftLeft "<<" ]