Inaccuracy in the "Constants" section

From the section on constants:

With the above two constants the following expression will always return true.

john.age + five === ({name: 'John', age: 30}).age + (5)

This above statement isn't true; while john is declared as a constant; that only means that john can't be replaced with a different object, not that its fields can't be modified. A simple john.age = 10 would cause the above expression to return false, despite the definition of john as a constant.

Start by locating the "Constants" section in the project documentation and review the quoted expression alongside its explanation. Verify the behavior when the object's age property changes, then revise the section so the claim about constants is accurate. Done means the example and surrounding explanation no longer imply that object fields are immutable.