Strange behavior with Git add -p in version 2.13.3

Hello, I updated Git to 2.13.3, and now selecting 's' to split a change on a call to `git add -p` is not working. It's showing the list of options as if 's' is not a valid choice...

Particularly, I'm getting... Stage this hunk [y,n,q,a,d,/,e,?]? s y - stage this hunk n - do not stage this hunk q - quit; do not stage this hunk or any of the remaining ones a - stage this hunk and all later hunks in the file d - do not stage this hunk or any of the later hunks in the file g - select a hunk to go to / - search for a hunk matching the given regex j - leave this hunk undecided, see next undecided hunk J - leave this hunk undecided, see next hunk k - leave this hunk undecided, see previous undecided hunk K - leave this hunk undecided, see previous hunk s - split the current hunk into smaller hunks e - manually edit the current hunk ? - print help

Is anyone else having this problem? Does anybody know how to resolve it? I'm running on macOS Version 10.12.5.

Thanks in advance!

-Ben