unposted: Improve documentation and add regression test for workers/47745

ChangeLog

@@ -1,5 +1,8 @@
 2021-03-23  dana  <dana@dana.is>
 
+	* unposted: Doc/Zsh/expn.yo, Test/D07multibyte.ztst: Improve
+	documentation and add regression test for workers/47745
+
 	* 47745: Stephane Chazelas: Src/utils.c: Fix [:IDENT:] vs
 	posixidentifiers
 

Doc/Zsh/expn.yo

@@ -2134,7 +2134,8 @@ is not sensitive to the locale:
 startitem()
 item(tt([:IDENT:]))(
 The character is allowed to form part of a shell identifier, such
-as a parameter name
+as a parameter name; this test respects the tt(POSIX_IDENTIFIERS)
+option
 )
 item(tt([:IFS:]))(
 The character is used as an input field separator, i.e. is contained in the

Test/D07multibyte.ztst

@@ -178,6 +178,13 @@
 >3
 ?(eval):1: command not found: hähä=3
 
+  expr='[[ é = [[:IDENT:]] ]]'
+  ( unsetopt posix_identifiers; eval $expr && echo ok unset )
+  ( setopt posix_identifiers;   eval $expr || echo ok set )
+0:Regression test for workers/47745
+>ok unset
+>ok set
+
   foo="Ølaf«Ødd«øpénëd«ån«àpple"
   print -l ${(s.«.)foo}
   ioh="Ἐν ἀρχῇ ἦν ὁ λόγος, καὶ ὁ λόγος ἦν πρὸς τὸν θεόν, καὶ θεὸς ἦν ὁ λόγος."