Clarification between redo and reset?

[JensRantil]

What's the difference between redo and reset? README states

# roll back the most recently applied migration, then run it again.
migrate -url driver://url -path ./migrations redo

# run down and then up command
migrate -url driver://url -path ./migrations reset

, but I'm somewhat unsure exactly how they differ.

[gravis]

Redo will go 1 step back, and 1 step forward; while reset will go back until the first migration, and run again all migrations.