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-rw-r--r--lisp/emacs-lisp/syntax.el7
1 files changed, 6 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/syntax.el b/lisp/emacs-lisp/syntax.el
index 11cc1988b1f..f4f077264be 100644
--- a/lisp/emacs-lisp/syntax.el
+++ b/lisp/emacs-lisp/syntax.el
@@ -65,7 +65,12 @@ cannot be handled just by the buffer's syntax-table.
The specified function may call `syntax-ppss' on any position
before END, but it should not call `syntax-ppss-flush-cache',
which means that it should not call `syntax-ppss' on some
-position and later modify the buffer on some earlier position.")
+position and later modify the buffer on some earlier position.
+
+Note: When this variable is a function, it must apply _all_ the
+`syntax-table' properties needed in the given text interval.
+Using both this function and other means to apply these
+properties won't work properly.")
(defvar syntax-propertize-chunk-size 500)