Mention negative depth in syntax-ppss's output.

diff --git a/lispref/syntax.texi b/lispref/syntax.texi
index 7297f6b9104b3789f87986e12dbc87ef33e027cb..523053f214cda1e0d06b73434cb673ef165491c3 100644 (file)
--- a/lispref/syntax.texi
+++ b/lispref/syntax.texi
@@ -672,7 +672,8 @@ the parse:
 
 @enumerate 0
 @item
-The depth in parentheses, counting from 0.
+The depth in parentheses, counting from 0.  Beware, it can
+become negative if there are more closing parens than opening ones.
 
 @item
 @cindex innermost containing parentheses