Fix typos in lisp/*.el

Fix typos in lisp/*.el

* lisp/emacs-lisp/generator.el (cps--with-value-wrapper)
(cps-inhibit-atomic-optimization, iter-close):
* lisp/gnus/nnir.el (nnir-imap-search-arguments)
(nnir-imap-search-argument-history, nnir-categorize)
(nnir-ignored-newsgroups)
(nnir-retrieve-headers-override-function)
(nnir-imap-default-search-key, nnir-namazu-additional-switches)
(gnus-group-make-nnir-group, nnir-add-result)
(nnir-compose-result, nnir-run-imap, nnir-imap-make-query)
(nnir-imap-query-to-imap, nnir-imap-expr-to-imap)
(nnir-imap-next-term, nnir-run-swish-e, nnir-run-namazu)
(nnir-read-parm, nnir-read-server-parm, nnir-search-thread):
Trivial doc fixes.