CG 5.8.3: updating committish of lsr snippets

[Federico Bruni]

Two months ago I discussed with Francisco a problem with committish and 
LSR snippets:
http://lilypond-translations.3384276.n2.nabble.com/Doc-it-revision-of-snippets-in-LM-please-backport-to-2-14-td6600646.html

(read last messages in particular)


Information in CG 5.8.3, Updating translation committishes, is Ok for 
people who have push access.
For those who haven't, a different method should be recommended. 
Otherwise the maintenance scripts will complain about bad objects (non 
existing committishes).

In the thread above Francisco proposed a solution.
Please think about what's the best solution and update CG.

Thanks,
Federico