fix of operator clashing

Author: raydac

src/main/java/com/igormaznitsa/prologparser/tokenizer/TreeItem.java

@@ -254,7 +254,7 @@ PrologTerm convertToTermAndRelease() {
           }
 
           if (!isPrecedenceOrderOk()) {
-            if (this.rightBranch != null || this.leftBranch != null) {
+            if (this.rightBranch != null ^ this.leftBranch != null) {
               final Op operator = (Op) wrapper.getWrappedTerm();
               if (operator.getOpAssoc() == OpAssoc.XF || operator.getOpAssoc() == OpAssoc.YF || operator.getOpAssoc() == OpAssoc.FX || operator.getOpAssoc() == OpAssoc.FY) {
                 final PrologTerm that = this.rightBranch != null

src/test/java/com/igormaznitsa/prologparser/IntegrationTest.java

@@ -969,6 +969,7 @@ public void testOperatorAsFunctor() throws Exception {
   public void testPairOfOperatorsWithIncompatiblePrecedence() throws Exception {
     assertEquals("-(discontiguous)", parseEd("-discontiguous.").next().toString());
     assertEquals("a : b :> c :> d", parseEd("a:b:>c:>d.", DefaultParserContext.of(ParserContext.FLAG_NONE, Op.make(500, XFY, ":>"))).next().toString());
+    assertThrows(PrologParserException.class, () -> parseEd("X=(a,b,c; dynamic d).").next());
     assertThrows(PrologParserException.class, () -> parseEd("a :- b :- c.").next());
     assertThrows(PrologParserException.class, () -> parseEd("?-mother(pam,bob);").next());
   }