wdired-change-to-wdired-mode

Emacs標準機能で、ソースコードには以下書いてある

In WDired mode, you can edit the names of the files in the
buffer, the target of the links, and the permission bits of the
files.  After typing \\[wdired-finish-edit], Emacs modifies the files and
directories to reflect your edits.

;; wdired
(define-key dired-mode-map "r" 'wdired-change-to-wdired-mode)

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