footnote about keyword args
diff --git a/Doc/ref/ref5.tex b/Doc/ref/ref5.tex
index 00383ef..62cd9a7 100644
--- a/Doc/ref/ref5.tex
+++ b/Doc/ref/ref5.tex
@@ -318,7 +318,8 @@
 \index{call}
 
 A call calls a callable object (e.g. a function) with a possibly empty
-series of arguments:
+series of arguments:\footnote{The new syntax for keyword arguments is
+not yet documented in this manual.  See chapter 12 of the Tutorial.}
 \obindex{callable}
 
 \begin{verbatim}
diff --git a/Doc/ref/ref7.tex b/Doc/ref/ref7.tex
index 196215a..89fa6ed 100644
--- a/Doc/ref/ref7.tex
+++ b/Doc/ref/ref7.tex
@@ -267,7 +267,9 @@
 \indexii{function}{definition}
 
 A function definition defines a user-defined function object (see
-section \ref{types}):
+section \ref{types}):\footnote{The new syntax to receive arbitrary
+keyword arguments is not yet documented in this manual.  See chapter
+12 of the Tutorial.}
 \obindex{user-defined function}
 \obindex{function}
 
diff --git a/Doc/ref5.tex b/Doc/ref5.tex
index 00383ef..62cd9a7 100644
--- a/Doc/ref5.tex
+++ b/Doc/ref5.tex
@@ -318,7 +318,8 @@
 \index{call}
 
 A call calls a callable object (e.g. a function) with a possibly empty
-series of arguments:
+series of arguments:\footnote{The new syntax for keyword arguments is
+not yet documented in this manual.  See chapter 12 of the Tutorial.}
 \obindex{callable}
 
 \begin{verbatim}
diff --git a/Doc/ref7.tex b/Doc/ref7.tex
index 196215a..89fa6ed 100644
--- a/Doc/ref7.tex
+++ b/Doc/ref7.tex
@@ -267,7 +267,9 @@
 \indexii{function}{definition}
 
 A function definition defines a user-defined function object (see
-section \ref{types}):
+section \ref{types}):\footnote{The new syntax to receive arbitrary
+keyword arguments is not yet documented in this manual.  See chapter
+12 of the Tutorial.}
 \obindex{user-defined function}
 \obindex{function}