mkfs characters *?.,;:/|+=<>[]" are not allowed

[helpdeskdan]

bootiso:
4.1.1 (How on earth did I not get 4.2 from git?)

Category

Behavior

Describe the bug

bootiso: Creating vfat partition on '/dev/sdb1'... 
         mkfs.vfat: Labels with characters *?.,;:/\|+=<>[]" are not allowed 
         
         mkfs.fat 4.2 (2021-01-31) 

In my case I think it was a space. Simple substitute should fix that.

Expected behavior (for behavioral bugs only)

mkfs should work good-er

Reproduction

Try an Ubuntu iso - has spaces in the name

Exit status

Fail!

Environment:
mkfs 4.2

Additional context (optional)
Ubuntu

Suggestion fix (optional)

Maybe tr or sed?
work around:
-L Phat --mrsync