[PATCH v2 3/4] emacs: Add notmuch-crypto-gpg-program and use it

[David Bremner]

David Edmondson <dme at dme.org> writes:

> Allow the user to specify the gpg program to use when retriving keys,
> etc., defaulting to the value of `epg-gpg-program'.

typo in retriving.

More interestingly, would you mind documenting the use case in the
commit message? I'm unclear on a couple points

- why one needs a different gpg for key retrieval
- whether the new variable is just for key retrieval, or as the name
  notmuch-crypto-gpg-program suggests, all crypto operations from notmuch.