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bug#11067:; diff-buffer-with-file

From: Glenn Morris
Subject: bug#11067:; diff-buffer-with-file
Date: Sat, 24 Mar 2012 14:27:03 -0400
User-agent: Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/)

Stefan Monnier wrote:

> Hmm... interesting.  I found the -L in Debian's Info page and it's still
> there in Debian's "diffutils-1:3.2-2".  So either it's a local addition
> done by Debian, or the -L is actually documented.

diffutils seem to be going backwards and forwards on this one, eg


Paul can probably tell us the current thinking...

Anyway, what about Solaris's diff, which has neither -L nor --label?

Why not test for this option, which Emacs presumably uses only for
cosmetic effect, before using it?

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