+= structured bindings mentioning; -= '\n' (isocpp#1646)

It worth to mention the *structured bindings* right in the *Reason* section.

Author: al-mission-2016

CppCoreGuidelines.md

@@ -3076,8 +3076,7 @@ The argument against is prevents (very frequent) use of move semantics.
 ##### Reason
 
 A return value is self-documenting as an "output-only" value.
-Note that C++ does have multiple return values, by convention of using a `tuple` (including `pair`),
-possibly with the extra convenience of `tie` at the call site.
+Note that C++ does have multiple return values, by convention of using a `tuple` (including `pair`), possibly with the extra convenience of `tie` or structured bindings (C++17) at the call site.
 Prefer using a named struct where there are semantics to the returned value. Otherwise, a nameless `tuple` is useful in generic code.
 
 ##### Example