Update src/numeric-values.js

Co-authored-by: Bramus <[email protected]>

src/numeric-values.js

@@ -744,7 +744,7 @@ function reifyMathExpression(num) {
     return num.name === 'min' ? new CSSMathMin(...values) : new CSSMathMax(...values);
   }
 
-  // Assert: Otherwise, num is a calc().
+  // 2. Assert: Otherwise, num is a calc().
   if (num.name !== 'calc') {
     return null;
   }