[luatex] creating a "verbatim"-like catcode table from Lua

[Élie Roux]

Hi,

There is a "String" catcodetable pre-defined by luatexbase, its
definition is around

https://github.com/lualatex/luatexbase/blob/master/luatexbase-cctb.dtx#L510

Thank you,
-- 
Elie