Subject: bug#42296: 27.0.91; Correct manual entry for 'concat' w.r.t. allocation [PATCH]

From: Eli Zaretskii <[email-masked]>
Date: Thu, 09 Jul 2020 20:31:38 +0300

> From: Mattias Engdegård <[email-masked]>
> Date: Thu, 9 Jul 2020 17:54:10 +0200
> 
> 'concat' hasn't guaranteed the allocation of a new string since 1997 at least (79d137ffe7d). Remove claims to the contrary from the manual.

This loses too much useful information, IMO.  Let's please say that
the result is sometimes ("frequently"?), but not always, a new string,
and that programs should not rely on that aspect.

Thanks.