Sort command doesn't sort '@' character correctly

[Michael Jensen]

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -g -O2 -fdebug-prefix-map=/build/bash-a6qmCk/bash-5.0=. 
-fstack-protector-stron>
uname output: Linux ubuntu 5.4.0-73-generic #82-Ubuntu SMP Wed Apr 14 17:39:42 
UTC 2021 x86_64 x86_>
Machine Type: x86_64-pc-linux-gnu

Bash Version: 5.0
Patch Level: 17
Release Status: release

Description:
        sorting lines where some starts with @ and some doesn't, it will not 
sort the lines correct

Repeat-By:

        echo "xxaxxon" > test.txt
        echo "@zorg" >> test.txt
        echo "@jupiterlander" >> test.txt
        cat test.txt | sort

        Note it prints out:

        @jupiterlander
        xxaxxon
        @zorg

        Expected:

        @jupiterlander
        @zorg
        xxaxxon