Normative: allow named capture groups in Annex B non-u regex grammar (#…

…2729)

spec.html

@@ -46979,7 +46979,7 @@ <h2>Syntax</h2>
           `\` AtomEscape[~UnicodeMode, ?N]
           `\` [lookahead == `c`]
           CharacterClass[~UnicodeMode]
-          `(` Disjunction[~UnicodeMode, ?N] `)`
+          `(` GroupSpecifier[~UnicodeMode] Disjunction[~UnicodeMode, ?N] `)`
           `(` `?` `:` Disjunction[~UnicodeMode, ?N] `)`
           InvalidBracedQuantifier
           ExtendedPatternCharacter
@@ -47069,7 +47069,7 @@ <h1>Static Semantics: Early Errors</h1>
 
       <emu-annex id="sec-countleftcapturingparens-annexb">
         <h1>Static Semantics: CountLeftCapturingParensWithin and CountLeftCapturingParensBefore</h1>
-        <p>In the definitions of CountLeftCapturingParensWithin and CountLeftCapturingParensBefore, references to &ldquo;<emu-grammar>Atom :: `(` GroupSpecifier Disjunction `)`</emu-grammar> &rdquo; are to be interpreted as meaning &ldquo;<emu-grammar>Atom :: `(` GroupSpecifier Disjunction `)`</emu-grammar> &rdquo; or &ldquo;<emu-grammar>ExtendedAtom :: `(` Disjunction `)`</emu-grammar> &rdquo;.</p>
+        <p>In the definitions of CountLeftCapturingParensWithin and CountLeftCapturingParensBefore, references to &ldquo;<emu-grammar>Atom :: `(` GroupSpecifier Disjunction `)`</emu-grammar> &rdquo; are to be interpreted as meaning &ldquo;<emu-grammar>Atom :: `(` GroupSpecifier Disjunction `)`</emu-grammar> &rdquo; or &ldquo;<emu-grammar>ExtendedAtom :: `(` GroupSpecifier Disjunction `)`</emu-grammar> &rdquo;.</p>
       </emu-annex>
 
       <emu-annex id="sec-patterns-static-semantics-is-character-class-annexb">