Hello,
> local first = "catalogue-ctan"
> local cdata = string.gsub(first,'^catalogue-', '') print
> ("first = "..first) print ("cdata = "..cdata)
>
> the output:
> first = catalogue-ctan
The pattern matches "catalogu" at the beginning of the string and
then as few "e" as possible (minimum matching), therefore it matches
"catalogu" and removes it.
You should use "^catalogue%-" to escape the "-", since it is a
special character when inside the pattern (see the Lua reference
manual, "Patterns").
> cdata = e-ctan
>
> Same happens with
> local cdata = string.match(first,'^catalogue-(.*)')
Same thing.
> (texlua from TeX Live repository)
>
> Best wishes
HTH,
Jonathan
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