; reftex.el: Checkdoc fixes, comments to docstrings

; reftex.el: Checkdoc fixes, comments to docstrings

* lisp/textmodes/reftex.el (reftex-next-multifile-index):
(reftex-TeX-master-file, reftex-is-multi):
(reftex-get-cite-format, reftex-ensure-compiled-variables):
(reftex-erase-all-selection-and-index-buffers):
(reftex-compile-variables, reftex-parse-args):
(reftex-access-scan-info, reftex-check-parse-consistency):
(reftex-select-external-document, reftex-find-file-externally):
(reftex-access-search-path, reftex-find-file-on-path):
(reftex-parse-colon-path, reftex-expand-path):
(reftex-recursive-directory-list, reftex-typekey-check):
(reftex-check-recursive-edit, reftex-no-props):
(reftex-match-string, reftex-kill-buffer):
(reftex-erase-buffer, reftex-this-word, reftex-all-assq):
(reftex-all-assoc-string, reftex-last-assoc-before-elt):
(reftex-sublist-nth, reftex-make-selection-buffer-name):
(reftex-make-index-buffer-name, reftex-truncate):
(reftex-nearest-match, reftex-auto-mode-alist):
(reftex-enlarge-to-fit, reftex-select-with-char):
(reftex-make-regexp-allow-for-ctrl-m, reftex-visited-files):
(reftex-get-file-buffer-force, reftex-kill-temporary-buffers):
(reftex-splice-symbols-into-list, reftex-uniquify):
(reftex-uniquify-by-car, reftex-nicify-text, reftex-refontify):
(reftex-fontify-select-label-buffer):
(reftex-select-font-lock-fontify-region):
(reftex-verified-face, reftex-highlight-shall-die): Convert
comment to docstring in functions.
(reftex-silence-toc-markers): Convert comment to docstring and
capitalize argument.
(reftex-set-cite-format): Capitalize argument.  (AUCTeX bug#77864)

(cherry picked from commit 9e322088b01f45a024827ead350a02f29d197e0b)