--- a/runtime/doc/change.txt
+++ b/runtime/doc/change.txt
@@ -1,4 +1,4 @@
-*change.txt*    For Vim version 7.0aa.  Last change: 2005 May 31
+*change.txt*    For Vim version 7.0aa.  Last change: 2005 Jun 16
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1074,9 +1074,12 @@ normal command-line editing commands are
 history for expressions.  When you end the command-line by typing <CR>, Vim
 computes the result of the expression.  If you end it with <Esc>, Vim abandons
 the expression.  If you do not enter an expression, Vim uses the previous
-expression (like with the "/" command).  If the "= register is used for the
-"p" command, the string is split up at <NL> characters.  If the string ends in
-a <NL>, it is regarded as a linewise register.  {not in Vi}
+expression (like with the "/" command).  The expression must evaluate to a
+string.  If the result is a number it's turned into a string.  A List,
+Dictionary or FuncRef results in an error message (use string() to convert).
+If the "= register is used for the "p" command, the string is split up at <NL>
+characters.  If the string ends in a <NL>, it is regarded as a linewise
+register.  {not in Vi}
 
 7. Selection and drop registers "*, "+ and "~ 
 Use these register for storing and retrieving the selected text for the GUI.

--- a/src/misc2.c
+++ b/src/misc2.c
@@ -5666,3 +5666,41 @@ filewritable(fname)
     return retval;
 }
 #endif
+
+/*
+ * Print an error message with one or two "%s" and one or two string arguments.
+ * This is not in message.c to avoid a warning for prototypes.
+ */
+    int
+emsg3(s, a1, a2)
+    char_u *s, *a1, *a2;
+{
+    if ((emsg_off > 0 && vim_strchr(p_debug, 'm') == NULL)
+#ifdef FEAT_EVAL
+	    || emsg_skip > 0
+#endif
+	    )
+	return TRUE;		/* no error messages at the moment */
+    vim_snprintf((char *)IObuff, IOSIZE, (char *)s, (long)a1, (long)a2);
+    return emsg(IObuff);
+}
+
+/*
+ * Print an error message with one "%ld" and one long int argument.
+ * This is not in message.c to avoid a warning for prototypes.
+ */
+    int
+emsgn(s, n)
+    char_u	*s;
+    long	n;
+{
+    if ((emsg_off > 0 && vim_strchr(p_debug, 'm') == NULL)
+#ifdef FEAT_EVAL
+	    || emsg_skip > 0
+#endif
+	    )
+	return TRUE;		/* no error messages at the moment */
+    vim_snprintf((char *)IObuff, IOSIZE, (char *)s, n);
+    return emsg(IObuff);
+}
+