You can cross one-block gaps while walking straight.

What I expected to happen was...:

I expected to fall into the one block gap.

What actually happened was...:
I walked over the one block gap

Steps to Reproduce:
1. Make a one block gap, it doesn't matter where.
2. Line up your camera in a way where you are looking perfectly straight (Not looking to the side at all.

3. Walk across. You should walk across the gap.