Single-quote in `firmware.ini` removes the inserted block from remote `config.txt`

Steps to reproduce:
- Edit `firmware.ini` to include a single-quote in a comment
- Run script
- Connect to remote filesystem
- Observe `/boot/firmware/config.txt` (or `/boot/config.txt`)

Expected outcome:
- `firmware.ini` should be present within `config.txt`

Actual outcome:
- `config.txt` does not have the desired content after synchronization