[superseded] new quoted: outplace version of addQuoted

[timotheecour]

quoted is what's most convenient to use most of the time (addQuoted when efficiency is needed); I'm putting it in system (yes, more bloat) because addQuoted is already there

The alternative I considered was to put it under strutils but this seemed worse: strutils carries a bunch of dependencies, and it'd be awkward to split quoted(outplace) vs addQuoted(inplace) in different modules

[Araq]

Not acceptable. I never need it, so why add it to system?

[timotheecour]

PTAL, I moved it to strutils

[Araq]

I'll let people vote on this one. IMO it's pointless cruft and strutils is already too big too.

[liquidev]

Don't we have strutils.escape already?

[Clyybber]

And we have sugar.outplace for this kind of thing. We only need to assign it an operator IMO.

[Clyybber]

What could also work, is to introduce quoted and move the actual implementation from addQuoted to it.
Then we could deprecate addQuoted in favor of add quoted.

[timotheecour]

with #13309 we'll be able to do:
"".@addQuoted("foo")

I will close this PR if #13309 gets merged

[timotheecour]

actually the more I think of it the more I believe #13309 is the way to go. closing.