Fix an incorrect comparison in crypto/sbox

Author: user202729

src/sage/crypto/sbox.pyx

@@ -252,7 +252,7 @@ cdef class SBox(SageObject):
             raise NotImplemented
 
         cdef SBox other = <SBox> rhs
-        return (self._S_list == other._S_list) and (self._big_endian == self._big_endian)
+        return (self._S_list == other._S_list) and (self._big_endian == other._big_endian)
 
     def __ne__(self, other):
         """