For example:
config rule
option name 'Foo's subnet DHCP Broadcast'
…
So yes, an apostrophe inside of single quotes it really just a(n unescaped) single quote inside of single quotes. It's hideous of somebody to do that. But humans are, well, … humans. Computers are better than humans (at some things, particularly things like this).
Firewall4 equally (IMHO, or maybe even more so) hideously silently fails on that. No error/warning/failure-to-load-rules. It pooches the ruleset, locking out a remote user!!