Using recfmt with curly-brace markup

[Liliana Marie Prikler]

Hi folks,

I'm trying to use recfmt to generate LaTeX code snippets from records.
The current implementation results in a fatal error ("invalid
expression in a template slot") when straightforwardly attempting to
wrap recfmt's template syntax in another pair of braces.  This has
somewhat been discussed in a related use case in Guix, which would be
to get BibTeX records from package descriptions [1].

I attached a patch, which excludes opening braces from the internals of
a template slot.  This makes it so that only the inner-most template
pairs are matched and the resulting SEX compiles correctly.

Cheers

[1] https://lists.gnu.org/archive/html/guix-devel/2021-12/msg00070.html

0001-recfmt-Allow-curly-brace-markup-in-template.patch
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