Fix documentation of the "C-c ." command.

Report by Bostjanv Vilfan.

doc/ChangeLog

@@ -1,3 +1,8 @@
+2008-09-05  Carsten Dominik  <dominik@science.uva.nl>
+
+	* org.texi (Creating timestamps): Fix documentation of the "C-c ."
+	command.
+
 2008-06-13  Carsten Dominik  <dominik@science.uva.nl>
 
 	* org.texi: Modify license to no longer include back- and front

doc/org.texi

@@ -4221,9 +4221,10 @@ format.
 @table @kbd
 @kindex C-c .
 @item C-c .
-Prompt for a date and insert a corresponding time stamp.  When the
-cursor is at a previously used time stamp, it is updated to NOW.  When
-this command is used twice in succession, a time range is inserted.
+Prompt for a date and insert a corresponding time stamp.  When the cursor is
+at an existing time stamp in the buffer, the command is used to modify this
+timestamp instead of inserting a new one.  When this command is used twice in
+succession, a time range is inserted.
 @c
 @kindex C-u C-c .
 @item C-u C-c .