Rigidbody2D.Slide doesn't always complete a movement under certain circumstances.

Steps to reproduce:

1. Load the attached project and "SampleScene".
2. Hit Play
3. Press Left "A" until the "Player" hits the "Floor" block.

Actual results: 

"Player" stops short of hitting the the block.

Expected results: 

"Player" should stop as close to the block as it does the floor underneath the player.

Reproducible with versions: 

Not reproducible with versions: 

Can’t test with versions: 

Tested on (OS): 

Notes:

• Discussions: https://discussions.unity.com/t/rigidbody2d-slide-leaves-a-gap-when-moving-into-walls/1685111