Use negation of '==' instead of '!='

Base/Axis/Frame.cpp

@@ -118,7 +118,7 @@ bool Frame::operator==(const Frame& o) const
     if (rank() != o.rank())
         return false;
     for (size_t k = 0; k < rank(); ++k)
-        if (axis(k) != o.axis(k))
+        if (!(axis(k) == o.axis(k)))
             return false;
     return true;
 }

Tests/Unit/Base/PointwiseAxisTest.cpp

@@ -89,7 +89,7 @@ TEST(PointwiseAxis, ClippedAxis)
     EXPECT_TRUE(clip2 == axis);
 
     Scale clip3 = axis.clipped(1.5, 2.5);
-    EXPECT_TRUE(clip3 != axis);
+    EXPECT_TRUE(!(clip3 == axis));
     EXPECT_EQ(clip3.size(), 2u);
     EXPECT_EQ(clip3.binCenter(0), 2.0);
     EXPECT_EQ(clip3.binCenter(1), 2.5);