Unicode in an Emacs regular expression

Solution 1:

This requires enable-recursive-minibuffers is set to non-nil:

M-x replace-regexp RET C-x 8 RET 202e RET RET C-x 8 RET 202d RET RET

Solution 2:

1. Add the following piece of emacs Lisp code at the beginning of the buffer:

   (while (re-search-forward "\u202e" nil t)
        (replace-match     "\u202d"))

2. Place the cursor just after the last parenthesis and type C-xC-e to execute the code.

Solution 3:

M-x replace-regexp RET \u202e RET \u202d

Solution 4:

Type the following:

M-% C-q 20056 RET RET C-q 20055 RET RET

C-q followed by an octal number and RET will insert the character represented by the octal number and discard the RET. To quickly convert hex to octal, type #x202e in a M-: prompt, which will print the resulting number in decimal, octal, and hex.

To enable easier input of decimal numbers, a la GTK's C-S-u binding, I use this in my .emacs:

(global-set-key [(control shift u)]
                (lambda ()
                  (interactive)
                  (let ((read-quoted-char-radix 16))
                    (call-interactively 'quoted-insert))))