emacs: rename notmuch-address-completion-hook to notmuch-address-post-completion-functions

Apparently it is a (not completely adhered to) emacs convention [1] that
only hooks that don't take arguments end in 'hook'

[1]: https://www.gnu.org/software/emacs/manual/html_node/elisp/Hooks.html

emacs/notmuch-address.el

@@ -98,7 +98,7 @@ to know how address selection is made by default."
   :group 'notmuch-send
   :group 'notmuch-external)
 
-(defcustom notmuch-address-completion-hook nil
+(defcustom notmuch-address-post-completion-functions nil
   "Functions called after completing address.
 
 The completed address is passed as an argument to each function.
@@ -218,7 +218,7 @@ external commands."
 	    (push chosen notmuch-address-history)
 	    (delete-region beg end)
 	    (insert chosen)
-	    (run-hook-with-args 'notmuch-address-completion-hook chosen))
+	    (run-hook-with-args 'notmuch-address-post-completion-functions chosen))
 	(message "No matches.")
 	(ding))))
    (t nil)))

emacs/notmuch-company.el

@@ -86,7 +86,7 @@
       (match (if (string-match notmuch-company-last-prefix arg)
 		 (match-end 0)
 	       0))
-      (post-completion (run-hook-with-args 'notmuch-address-completion-hook arg))
+      (post-completion (run-hook-with-args 'notmuch-address-post-completion-functions arg))
       (no-cache t))))