lisp/*.el: Fix typos.

lisp/*.el: Fix typos.

* lisp/align.el (align-regexp): Remove superfluous backslash.

* lisp/ffap.el (ffap-ftp-default-user, ffap-url-regexp)
  (ffap-pass-wildcards-to-dired, dired-at-point-require-prefix)
  (ffap-rfc-path, ffap-ftp-sans-slash-regexp, ffap-menu-regexp):
  Fix docstring typos.
  (ffap-next): Use C-u in docstring.
  (ffap-machine-p, ffap-list-env, ffap-alist, ffap-alist)
  (ffap-string-at-point-mode-alist, ffap-menu, ffap-menu-ask):
  Remove superfluous backslashes.
  (ffap-string-at-point): Reflow docstring.

* lisp/server.el (server-host): Reflow docstring.
  (server-unload-function): Fix docstring typo.
  (server-eval-at): Remove superfluous backslash.

* lisp/skeleton.el (skeleton-insert): Remove superfluous backslash.
  (skeleton-insert): Doc fix.
  (skeleton-insert): Reflow docstring.

* lisp/term/tty-colors.el (tty-color-alist, tty-modify-color-alist)
  (tty-color-approximate, tty-color-by-index, tty-color-values)
  (tty-color-desc): Remove superfluous backslashes.