[PATCH] extdiff: fix defaulting to "diff" if no --program is given

[Matt Mackall]

On Thu, 2009-10-01 at 06:51 +0000, Peter Arrenbrecht wrote:
> # HG changeset patch
> # User Peter Arrenbrecht <peter.arrenbrecht at gmail.com>
> # Date 1254379810 -7200
> extdiff: fix defaulting to "diff" if no --program is given

Queued for stable, thanks.

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