comma_format makes sprintf go nuts - fixes #1292

Signed-off-by: emanuele <emanuele45@gmail.com>
Child board/s to Sub-board/s in texts and comments

Signed-off-by: emanuele <emanuele45@gmail.com>
Merge pull request #1327 from emanuele45/quickfix

comma_format makes sprintf go nuts - fixes #1292