As far as I can see, the parentheses have no semantic effect in this case.
This is in a core language section, where we usually claim that coding-style harmonization is usually not applied "to show the diversity of the core language" or something to that effect.

As far as I can see, the parentheses have no semantic effect in this case.

The example is ill-formed: (sizeof(T) > 1) && get_value<T>() is not a constraint-logical-or-expression since get_value<T>() is not a primary-expression. (get_value<T>()) is a primary expression, so the example is well-formed after the change.

Thanks, @CaseyCarter, for explaining that. You're right, it seems.