Here is the literal language in the shift:
(Old)
...
This would exclude someone who intends to vote but has not yet registered to vote, such as someone very partisan who intends to register to vote. So someone isn't going to register to vote until going to college... if such voters are more R than D that would favor Democrats in results.
The change is now:
So who would not vote who voted before?
1. People disillusioned with the political process altogether.
2. People losing the ability to decide to vote -- like those going senile.
3. People who do not expect to live long enough to vote.
4. People who expect to lose their voting rights, as after a felony conviction in some states.