Proofreading some smoketesting instructions

[Vincent Untz <vuntz gnome org>]

Hi,

I created a wiki page about smoketesting:
   http://live.gnome.org/Smoketesting

This contains instructions and ready-to-be-pasted shell commands to
build GNOME for smoketesting. The goal is to make it easy for a lot of
people to smoketest GNOME, especially the 2.14.0 release.

Could some of you please proofread and verify there's no big error
there?

Thanks,

Vincent

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