Unrevert most of regexp reentrancy abort patch

The problem was in:
  * src/syntax.c (update_syntax_table_forward): Propertize even when truncated
which is hence not unreverted.
The rest is:
* src/syntax.h (UPDATE_SYNTAX_TABLE_FORWARD_FAST):
(UPDATE_SYNTAX_TABLE_FAST): Re-introduce.
All callers in regex.c changed back to the _FAST versions.

* test/automated/message-mode-tests.el: Tweak the test to rely on auto
propertization in backward-sexp.

1 files changed, 3 insertions, 3 deletions

diff --git a/test/automated/message-mode-tests.el b/test/automated/message-mode-tests.el
index 49a72b0e67a..790b5c15125 100644
--- a/test/automated/message-mode-tests.el
+++ b/test/automated/message-mode-tests.el
@@ -40,9 +40,9 @@
                   "and here's a closer ")
           (let ((last-command-event ?\)))
             (ert-simulate-command '(self-insert-command 1)))
-          ;; Syntax propertization doesn't kick in batch mode
-          (when noninteractive
-            (syntax-propertize (point-max)))
+          ;; Auto syntax propertization doesn't kick in until
+          ;; parse-sexp-lookup-properties is set.
+          (setq-local parse-sexp-lookup-properties t)
           (backward-sexp)
           (should (string= "here's an opener "
                            (buffer-substring-no-properties