Variable 'notmuch-saved-searches-sort-function' does not exist;
'notmuch-saved-search-sort-function' is the correct name.
Signed-off-by: Luis Henriques <henrix@camandro.org>
The list of saved searches, including names, queries, and
additional per-query options.
-:index:`notmuch-saved-searches-sort-function`
+:index:`notmuch-saved-search-sort-function`
This variable controls how saved searches should be sorted. A value
of ``nil`` displays the saved searches in the order they are stored
in ‘notmuch-saved-searches’.