Re: I think I found a bug in Lua string.patterns, can anyone help see if it's true ?

Thank you for all your feedback !
At the end it was my fault by expecting back slashed escaped chars to be 
valid inside long strings (a painful learning today).
I've added a Lua script that dumps a pattern and looks for false escaped 
chars and warn about then, it's in the same github gist 
here https://gist.github.com/mingodad/4f54e0c26b66f72b21476cab6fa9fa47  

On Tuesday, May 12, 2026 at 2:41:07 PM UTC+2 Spar wrote:

> That's what I said :)
> Pretend like the input box is a [[ ]] literal.
>  
> YOu need to either use `"` literal for your pattern or gsub("\\n", "\n")
> On May 12, 2026 at 15:39 +0300, Domingo Alvarez Duarte <[email protected]>, 
> wrote:
>
> Hello Spar ! Your tool doesn't seem to interpret '[^\n]' properly:
> ``` 
> [^...]Inverse set.Matches any character except: 
> \Character.Doesn't match "\" literally.
> nCharacter.Doesn't match "n" literally.
> *Quantifier (zero or more).Allows to match the pattern zero or more 
> times. This will match the longest sequence.
> ```
>
> On Tuesday, May 12, 2026 at 2:35:14 PM UTC+2 Domingo Alvarez Duarte wrote:
>
>> Here is the pattern after `remove_re:gsub("\n", "\\n")` that I'm now 
>> looking at your tool: 
>> ====
>> \n\n\nCuentas Anuales%. Ejercicio %d+                                     
>>     +Pág%. %d+\n                     CUENTAS ANUALES DE LA ADMINISTRACIÓN 
>> GENERAL DE LA COMUNIDAD DE CASTILLA Y LEÓN%. EJERCICIO %d+\n\n\nEJECUCIÓN 
>> DEL PRESUPUESTO DE GASTOS DEL EJERCICIO %d+\nGASTOS POR 
>> APLICACIÓN\nADMINISTRACIÓN GENERAL[^\n]*\n[^\n]+\n\n[^\n]+\n\n
>> ====
>>
>> On Tuesday, May 12, 2026 at 2:21:24 PM UTC+2 Spar wrote:
>>
>>> Correction. It's not actually the \n. It's because you used `[[ ]]` 
>>> string literals which works as C++ raw literals. They don't accept escapes.
>>>  
>>> So what actually happens can be described by my tool which doesn't 
>>> accept escapes too (i will fix it some day) :-)
>>>  
>>> https://gitspartv.github.io/lua-patterns/?pattern=%5B%5E%5Cn%5D*
>>> On May 12, 2026 at 15:20 +0300, Luiz Henrique de Figueiredo <
>>> [email protected]>, wrote:
>>>
>>> Try this simple pattern
>>>
>>> local remove_re = "Cuentas Anuales.-CREDITO%s+"
>>>
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>>> .
>>>
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