(ido-ignore-extensions, ido-show-dot-for-dired, ido-max-dir-file-cache,

(ido-ignore-extensions, ido-show-dot-for-dired, ido-max-dir-file-cache,
ido-decorations, ido-rewrite-file-prompt-functions, ido-use-mycompletion-depth,
ido-magic-backward-char, ido-enter-dired, ido-enter-insert-buffer,
ido-enter-insert-file, ido-dired, ido-list-directory, ido-first-match,
ido-only-match, ido-subdir, ido-indicator): Fix typos in docstrings.
(ido-buffer-internal, ido-completion-help): Fix typos in messages.
(ido-read-internal): Fix typo in error message.