Re: Returning argument string (regexp-quote)

[Mattias Engdegård]

24 sep. 2019 kl. 18.20 skrev Eli Zaretskii <address@hidden>:
> 
>> More generally, do we need to preserve allocation for functions not 
>> specifically documented to return new strings? I can imagine there being 
>> code that depend on it by accident, but string mutation is rare.
> 
> I think the benefits from such general changes are barely tangible,
> whereas the risk of breaking someone's (perhaps even ours) code are
> real.  So I don't think we should do that, not in general.

Very well, I shan't go on a spree. What about the specific case of regexp-quote 
then?
It was responsible for a sizeable portion of local consing in some (non-public) 
code I was profiling.
Would the change need a mention in NEWS, and/or its doc string?