52218: update notes since 5.9 release

ChangeLog

@@ -1,3 +1,7 @@
+2023-10-15  Bart Schaefer  <schaefer@zsh.org>
+
+	* 52218: Etc/BUGS, NEWS, README: notes since 5.9 release
+
 2023-10-10  Oliver Kiddle  <opk@zsh.org>
 
 	* 52189: Completion/Unix/Type/_umountable, Src/Zle/complete.c:

Etc/BUGS

@@ -46,12 +46,12 @@ related, probably obsolete, vared special case for $TERM set to "emacs".
 ------------------------------------------------------------------------
 47561: [PATCH v4] vcs_info: choose backend by basedir
 ------------------------------------------------------------------------
-48091: Bug in compdescribe with matcher 'b:-=+'
+48091, 49276: Bug in compdescribe with matcher 'b:-=+'
 ------------------------------------------------------------------------
 users/26071: Strange behavior about option completion of "git push --f"
 ------------------------------------------------------------------------
 50930: If a conditional expression appears in a current-shell construct
 (such as { sleep 20 && print $? }) which is then suspended with ^Z, the
-return value of the left side of the expression is always 148 (SIGSTOP)
+return value of the left side of the expression is always 148 (SIGTSTP)
 and thus the expression is likely to be incorrectly interpreted.
 ------------------------------------------------------------------------

NEWS

@@ -18,6 +18,15 @@ consistent and better aligned with the POSIX-2017 specification of
 `set -e`. For details on what exactly changed, see the list of
 incompatibilities in the README file.
 
+Support for named references and namespaces has been added, similar to
+those features in ksh but with some notable differences. The `nameref`
+builtin and some ksh-equivlent namespace names are available by loading
+the zsh/ksh93 module.  See the documentation of that module for more.
+
+Non-forking command substitutions with ${ ... } and ${| ... } are now
+available, and the latter extended with ${|param| ... } to return the
+result via assignment to the named param rather than always via $REPLY.
+
 Changes since 5.8.1
 -------------------
 

README

@@ -79,6 +79,42 @@ consistent and better aligned with the POSIX-2017 specification of
       f() { { false; echo "This is printed only since 5.10." } || true }
       if f; then true; fi
 
+PCRE support is now PCRE2 by default.
+
+Parameter names may begin with a "." and follow a relaxed implementation
+of ksh namespace syntax.  Expansion of such parameters must use braces,
+that is, in ${.param.name} form.  Parameters so named are excluded from
+`typeset` and `set` output unless explicitly listed in `typeset` arguments
+or matched by a pattern with `typeset -m`.
+
+Interpretation of exclusion-patterns following alternation-patterns has
+been rationalised.  This means for example that `[[ ab = (|a*)~^(*b) ]]`
+is true where prevously it was false.
+
+Improvements to handling of terminal colors and attributes in prompts
+may change the behavior of some prompt sequences, most notably in
+cases where `esq=${(%)...}` is used to capture an escape sequence.
+
+The `which` and `functions` commands output function definitions in a
+format independent of the MULTI_FUNC_DEF option.
+
+Math context no longer interprets a leading underscore as part of a
+numeric constant.
+
+Nul and characters greater than \x77 are correctly handled by `read -d`.
+
+Return values of `sysopen` from the zsh/system module have been updated
+to be more similar to other commands in that module.
+
+The `watch' parameter and `log' command have moved to an autoloaded module.
+
+Tied parameters created with the zsh/db/gdbm module may not be re-tied
+as locals in nested function scope.  This prevents database corruption
+when a function scope ends.
+
+Many Completion/ functions have been updated to recent versions of their
+corresponding commands, so the results offered may have changed.
+
 Incompatibilities between 5.8.1 and 5.9
 ---------------------------------------