[PATCH 3/3] emacs: Handle switch-function argument of notmuch-mua-mail

[David Bremner]

Michal Sojka <sojkam1 at fel.cvut.cz> writes:

> notmuch-mua-mail ignored the switch-function argument and always used
> the function returned by notmuch-mua-get-switch-function instead. In
> order to support standard emacs interfaces (compose-mail in this
> case), this commit changes notmuch-mua-mail to use the switch-function
> argument if it is non-nil and notmuch-mua-get-switch-function
> otherwise.

pushed 1-3, plus the fixup

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