Fix non-inplace matrix multiplication operator.

ASTNode.cpp

@@ -29,9 +29,9 @@ const char* ASTBinary::op_str() const
 {
     static const char* s_op_strings[] = {
         ".", " ** ", " * ", " / ", " // ", " % ", " + ", " - ",
-        " << ", " >> ", " & ", " ^ ", " | ", " and ", " or ",
+        " << ", " >> ", " & ", " ^ ", " | ", " and ", " or ", " @ ",
         " += ", " -= ", " *= ", " /= ", " %= ", " **= ", " <<= ",
-        " >>= ", " &= ", " ^= ", " |= ", " //= ", " @ ", " @= ",
+        " >>= ", " &= ", " ^= ", " |= ", " //= ", " @= ",
     };
     return s_op_strings[op()];
 }

ASTNode.h

@@ -112,10 +112,11 @@ public:
     enum BinOp {
         BIN_ATTR, BIN_POWER, BIN_MULTIPLY, BIN_DIVIDE, BIN_FLOOR, BIN_MODULO,
         BIN_ADD, BIN_SUBTRACT, BIN_LSHIFT, BIN_RSHIFT, BIN_AND, BIN_XOR,
-        BIN_OR, BIN_LOG_AND, BIN_LOG_OR, BIN_IP_ADD, BIN_IP_SUBTRACT,
-        BIN_IP_MULTIPLY, BIN_IP_DIVIDE, BIN_IP_MODULO, BIN_IP_POWER,
-        BIN_IP_LSHIFT, BIN_IP_RSHIFT, BIN_IP_AND, BIN_IP_XOR, BIN_IP_OR,
-        BIN_IP_FLOOR, BIN_MAT_MULTIPLY, BIN_IP_MAT_MULTIPLY,
+        BIN_OR, BIN_LOG_AND, BIN_LOG_OR, BIN_MAT_MULTIPLY,
+        /* Inplace operations */
+        BIN_IP_ADD, BIN_IP_SUBTRACT, BIN_IP_MULTIPLY, BIN_IP_DIVIDE,
+        BIN_IP_MODULO, BIN_IP_POWER, BIN_IP_LSHIFT, BIN_IP_RSHIFT, BIN_IP_AND,
+        BIN_IP_XOR, BIN_IP_OR, BIN_IP_FLOOR, BIN_IP_MAT_MULTIPLY,
     };
 
     ASTBinary(PycRef<ASTNode> left, PycRef<ASTNode> right, int op,