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bug#2989: implement bash's ignoredups

From: jidanni
Subject: bug#2989: implement bash's ignoredups
Date: Tue, 14 Apr 2009 09:33:13 +0800

Dan Nicolaescu <address@hidden> writes:
> *** New user option `history-delete-duplicates'.
Well, OK, but see, there they still are at the <escape> p's below.
$ cd /tmp
$ echo a:\;date>Makefile
$ emacs -Q -eval '(setq history-delete-duplicates t)' Makefile
<escape> x c o m p i l e <return> <return> <escape> x <up>
<return> <return> <escape> x <up> <return> <return>
C-x <escape> <escape> <escape> p <escape> p <escape> p
emacs-version "22.3.1" (Yes, I still use <escape>).

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