### Rename fmap_Some_equiv' → fmap_Some_equiv_1.

We typically use the _1 and _2 suffix to denote individual directions of a lemmas that is a biimplication.

Showing

We typically use the _1 and _2 suffix to denote individual directions of a lemmas that is a biimplication.

Showing
with
**2 additions**
and
**2 deletions**
**+2**
**-2**