52218: update notes since 5.9 release

1 files changed, 36 insertions, 0 deletions

diff --git a/README b/README
index cb6d380aa..250b1d26e 100644
--- a/README
+++ b/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
 ---------------------------------------