Comment # 1 on bug 1229795 from Henk van Velden

It not only works that strange with this long option expansion, but also with a
simple file name:
henk@boven:~/test/co> touch aap=noot
henk@boven:~/test/co> l
total 8
drwxr-xr-x  2 henk wij 4096 Aug 26 10:33 ./
drwxr-xr-x 11 henk wij 4096 Aug 26 10:33 ../
-rw-r--r--  1 henk wij    0 Aug 26 10:33 aap=noot
henk@boven:~/test/co> rm aap\=noot
where I hit the Tab somewhere within aap. So it uses the \ for completion, but
I have no idea why. I see no reason to escape the = at all.