fish linter does not work on some non-English locales

[metiulekm]

The fish linter uses the following pattern:

local efm = "%E%f (line %l): %m,%C%p^,%C%.%#"

This matches the error message for a simple script:

$ LANG=C fish --version
fish, version 3.7.1
$ cat test.fish
|
$ LANG=C fish --no-execute test.fish
test.fish (line 1): Expected a string, but found a pipe
|
^
warning: Error while reading file test.fish

However, when I set the locale to pl_PL.UTF-8, the line word changes to linia:

$ LANG=pl_PL.UTF-8 fish --no-execute test.fish
test.fish (linia 1): Expected a string, but found a pipe
|
^
warning: Wystąpił błąd podczas odczytywania pliku test.fish

This no longer matches the pattern, which means that LANG=C nvim test.fish with the fish linter setup will display the error message, but LANG=pl_PL.UTF-8 nvim test.fish will not.