(dired-align-file, dired-flag-backup-files, dired-change-marks,

(dired-align-file, dired-flag-backup-files, dired-change-marks,
dired-unmark-all-files): "?\ " -> "?\s".
(dired-listing-switches, dired-ls-F-marks-symlinks, dired-dwim-target,
dired-load-hook, dired-mode-hook, dired-directory, dired-faces, dired,
dired-revert, dired-mode, dired-summary, dired-view-file,
dired-copy-filename-as-kill, dired-delete-file, dired-no-confirm,
dired-unmark-all-marks, dired-sort-by-date-regexp, dired-sort-by-name-regexp,
dired-sort-inhibit, dired-sort-other): Fix typos in docstrings.
(dired-undo, dired-get-file-for-visit, dired-sort-toggle-or-edit):
Fix typos in message strings.