BABE clock - space for examples, but none given

[laboon]

Page: https://spec.polkadot.network/sect-block-production

"Polkadot does this synchronization without relying on any external clock source (e.g., through the or the )."

There are just blank spaces after the two "the"'s - I assume there should be examples that go there. Otherwise the parenthetical clause can be removed.

[bhargavbh]

Thanks Bill! #696 closes the issue