Ctensor.texi parenthesis adjust



>   Date: Sun, 29 Sep 2013 06:23:15 -0300
>   From: Jorge Barros de Abreu <ficmatin10 at gmail.com>
>
>   Hi.
>
>   in Ctensor.texi there is:
>
>   Therefore, a meaningful computation sequence may begin with a frame
>   base, which is then used to compute lg (computed automatically by cmetric
>   and
>   then ug.
>
>   It is not obvious for me if the better is
>
>   Therefore, a meaningful computation sequence may begin with a frame
>   base, which is then used to compute lg (computed automatically by cmetric)
>   and
>   then ug.

I believe that the documentation in Ctensor.texi could use a serious
overhaul. The paragraph from which this sentence came is really
unhelpful, and would be better replaced by an example showing what the
author intends. Similarly, the documentation of frame_bracket is
unhelpful, with no example(s) so a user can't turn there to get help,
either.

FWIW, I believe that the parenthetical comment is correctly delimited,
but it should be at the end of the sentence, because it is ug that is
computed by cmetric.

Leo