[m-dev.] for review: cleanup of liveness info around calls

[Fergus Henderson]

On 11-Nov-1998, Zoltan Somogyi <zs at cs.mu.OZ.AU> wrote:
> 
> > Perhaps it's just a matter of experience, but I can read unified diffs
> > relatively easily, while context diffs require my full attention just
> > to see what has changed.
> 
> Virtually all the time I would agree with you, and I think it would
> be a good idea to replace context diffs with unified diffs for the tests.

I agree too -- but unified diffs are not portable, so you need to do
an autoconf test to see whether diff supports `-u'.
Also the tests can be distributed separately from the other
parts of the Mercury distribution, so this autoconf test needs
to go in a new configure.in file in the tests directory
rather than in the main configure.in file.

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "Binaries may die
WWW: <http://www.cs.mu.oz.au/~fjh>  |   but source code lives forever"
PGP: finger fjh at 128.250.37.3        |     -- leaked Microsoft memo.