-`notmuch-address-locate-command`,
-`notmuch-documentation-first-line`, `notmuch-folder`,
-`notmuch-hello-trim', `notmuch-hello-versions` => `notmuch-version`,
-`notmuch-remove-if-not`, `notmuch-search-disjunctive-regexp`,
-`notmuch-sexp-eof`, `notmuch-split-content-type`, and
-`notmuch-tree-button-activate`.
+ `notmuch-address-locate-command`,
+ `notmuch-documentation-first-line`, `notmuch-folder`,
+ `notmuch-hello-trim', `notmuch-hello-versions` => `notmuch-version`,
+ `notmuch-remove-if-not`, `notmuch-search-disjunctive-regexp`,
+ `notmuch-sexp-eof`, `notmuch-split-content-type`, and
+ `notmuch-tree-button-activate`.
+
+Keymaps are no longer fset, which means they need to be referred to in
+define-key directly (without quotes). If your Emacs configuration has a
+keybinding like:
+ (define-key 'notmuch-show-mode-map "7" 'foo)
+you should change it to:
+ (define-key notmuch-show-mode-map "7" 'foo)