Update objects.md

Signed-off-by: Herb Sutter <herb.sutter@gmail.com>

docs/cpp2/objects.md

@@ -79,7 +79,7 @@ f: () = {
     //  ...  no uses of buf here  ...
     buf = some_calculated_value;        // constructs (not assigns) buf
     //  ...
-    std::cout << buf[0];                   // ok, a has been initialized
+    std::cout << buf[0];                // ok, a has been initialized
 }
 
 g: () = {