ls sort ignore . in file names

[Valérie et David VANTYGHEM via GNU coreutils General Discussion]

Hello,

When I list files in a directory, they are sorted like . before file 
extension is ignored.

|$ ls -AR --format=single-column ./DISQUETTE\ 1/*|

‘./DISQUETTE 1/CONF.ENG’
‘./DISQUETTE 1/CONF.FRE’
‘./DISQUETTE 1/CONF.GER’
‘./DISQUETTE 1/CONFIRM.ENG’
‘./DISQUETTE 1/CONFIRM.FRE’
‘./DISQUETTE 1/CONFIRM.GER’
‘./DISQUETTE 1/CONFIRM.ITA’
‘./DISQUETTE 1/CONFIRM.SPA’
‘./DISQUETTE 1/CONF.ITA’
‘./DISQUETTE 1/CONF.SPA’

tree sort files without ignoring . before file extension:

|$ tree -daifv --noreport ./DISQUETTE\ 1/|xargs -I {} tree -aifv -L 1 
--noreport {}|xargs -I {} find {} -prune -type f|

./DISQUETTE 1/CONF.ENG
./DISQUETTE 1/CONF.FRE
./DISQUETTE 1/CONF.GER
./DISQUETTE 1/CONF.ITA
./DISQUETTE 1/CONF.SPA
./DISQUETTE 1/CONFIRM.ENG
./DISQUETTE 1/CONFIRM.FRE
./DISQUETTE 1/CONFIRM.GER
./DISQUETTE 1/CONFIRM.ITA
./DISQUETTE 1/CONFIRM.SPA

|Is it a bug or am I missing a ls option?|

|Test ZIP file: 
https://infolib.re/blog/wp-content/uploads/2025/02/DISQUETTE-1.zip
|

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