clean-duplicates: escape '+' in filenames

[xiota]

chaotic dedup misses filenames containing + because it's a special symbol in grep (Perl/Extended) regular expressions. find seems to work with escaped or unescaped +.

[xiota]

@PedroHLC Have you had a chance to look at this?

To see the problem this is intended to solve, run chaotic dedup, then:

$ repoctl status
On repo chaotic-aur

    c++utilities: obsolete(1)

Affected packages:

$ pacman -Ss '\+' | sed 's& .*$&&' | grep '+' | grep '^chaotic-aur'
chaotic-aur/c++utilities
chaotic-aur/foobillard++
chaotic-aur/libstdc++5
chaotic-aur/speedtest++

[PedroHLC]

@PedroHLC Have you had a chance to look at this?

I did, the thing is that I didn't like when I wrote the original pipe there, so I set myself to rewrite it later, but completely forgot about it, and now I'm considering rewriting it 😅 but still haven't got the chance.

[xiota]

Would it be okay to merge while future changes are pending?

(Alternatively, drop and ban any package with a + in its name.)

[dr460nf1r3]

Deployed to all builders 🧙

[xiota]

Thank you.