User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:107.0) Gecko/20100101
Firefox/107.0
Build Identifier: 

The system still boots correctly.

Reproducible: Always

Steps to Reproduce:
1. Take a valid line in /etc/crypttab, for example `cr_swap
UUID=319b999a-e7d7-467a-aa2c-d1813a237c67`
2. Add a # in front of it
3. Run `update-bootloader`
Actual Results:  
grub.cfg includes

```
### BEGIN /etc/grub.d/05_crypttab ###
crypttab_entry #cr_swap 319b999ae7d7467aaa2cd1813a237c67
```

Expected Results:  
The commented line should not have been included at all