Add tests of group 3

syntax/AccessChain.valid.mj

+class Test {
+    public void m() {
+        a.b.c(x, -z + 1).d.f.g();
+    }
+}

syntax/ArrayAccess.valid.mj

+class Test {
+    public void m() {
+        a[2 * (-i + 1)][2];
+    }
+}

syntax/ComplexExpression.valid.mj

+class Test {
+    public void m() {
+        a + -b * (z / (x > y - (a || b)));
+    }
+}

syntax/ElseOneBrace.invalid.mj

+class Test {
+    public void m() {
+        if (x > y)
+            return;
+        else {
+            return;
+    }
+}

syntax/EmptyArrayAccess.invalid.mj

+class Test {
+    public void m() {
+        a[];
+    }
+}

syntax/IfWhileNoBraces.valid.mj

+class Test {
+    public void m() {
+        if (x > y)
+            return;
+        else
+            return;
+        while (!c)
+            return;
+    }
+}

syntax/MethodInvocationArrayAccess.valid.mj

+class Test {
+    public void m() {
+        (m()[2] + 1);
+    }
+}

syntax/MinusMinus.invalid.mj

+class Test {
+    public void m() {
+        --b;
+    }
+}

syntax/NewArrayEmpty.invalid.mj

+class Test {
+    public void m() {
+        new int[];
+    }
+}

syntax/NewArrayWithAccess1.invalid.mj

+class Test {
+    public void m() {
+        new int[0][][0][];
+    }
+}

syntax/NewArrayWithAccess1.valid.mj

+class Test {
+    public void m() {
+        new int[0][][0];
+    }
+}

syntax/NewArrayWithAccess2.invalid.mj

+class Test {
+    public void m() {
+        new int[0][0][];
+    }
+}

syntax/NewArrayWithAccess2.valid.mj

+class Test {
+    public void m() {
+        new int[0][0];
+    }
+}

syntax/NotNot.valid.mj

+class Test {
+    public void m() {
+        !!b;
+    }
+}

syntax/TwoClasses.valid.mj

+class A {}
+
+class B {}