CWG2636 Update Annex E based on Unicode 15.0 UAX #31

Fixes NB US 132 (C++23 CD).

Author: burblebee

source/uax31.tex

@@ -85,14 +85,13 @@
 \rSec1[uaxid.pattern]{R3 Pattern_White_Space and Pattern_Syntax characters}
 
 \pnum
-UAX \#31 describes how languages that use or interpret patterns of characters,
-such as regular expressions or number formats,
-may describe that syntax with Unicode properties.
+UAX \#31 describes how formal languages
+such as computer languages should describe and implement
+their use of whitespace and syntactically significant characters
+during the processes of lexing and parsing.
 
 \pnum
-\Cpp{} does not do this as part of the language,
-deferring to library components for such usage of patterns.
-This requirement does not apply to \Cpp{}.
+\Cpp{} does not claim conformance with this requirement.
 
 \rSec1[uaxid.eqn]{R4 Equivalent normalized identifiers}