diff --git a/doc/variables.xml b/doc/variables.xml
index b4b48170..79eb3d5a 100644
--- a/doc/variables.xml
+++ b/doc/variables.xml
@@ -1000,11 +1000,7 @@
         use a temperature gradient, which makes the gradient values
         change depending on the amplitude of a particular graph
         value (try it and see). If -t or -l is your first argument,
-        you may need to preceed it by a space (' ').  You may also use
-        double-quotes around the exec argument should you need to execute a
-        command with spaces.  For example, ${execgraph "date +'%S'"} to execute
-        `date +'%S'` and graph the result.  Without quotes, it would simply
-        print the result of `date`.
+        you may need to preceed it by a space (' ').
         <para /></listitem>
     </varlistentry>
     <varlistentry>