profiles: safeguard single line comments

[glitsj16]

Using - on single line comments can break easily when users just uncomment a line. It's advised to use # instead.

Relates to #5942

[rusty-snake]

TBH uncommenting lines can break easily if you update firejail.

[rusty-snake]

And 👍 for #COMMAND # COMMENT difference.

[kmk3]

@glitsj16

Ah you beat me to it :p

I also started working on this with a script (I probably should have commented
about it on a related PR), though it's only for the # to # and fixing the
end-of-line comments (mostly no changes to existing normal comments).

It currently changes about ~220 files.

Do you mind if we try the automated way first and then continue with this PR
for whatever is missing?

[glitsj16]

And for #COMMAND # COMMENT difference.

@rusty-snake Thanks. There's bound to be plenty of places left were we could streamline this. Perhaps we can add an item in the template so it's a bit more explicit for anyone who contributes and cares to actually follow the template.

Do you mind if we try the automated way first and then continue with this PR
for whatever is missing?

@kmk3 Absolutely not, feel free to proceed with your scripted version 👍 .

[glitsj16]

Let's close this now that #5987 takes over.