man/sd-notify: /bin/bash -> /bin/sh, read -> read -r in example

man/systemd-notify.xml

@@ -166,13 +166,13 @@
       after having set up its communication channel. During runtime it
       sends further status updates to the init system:</para>
 
-      <programlisting>#!/bin/bash
+      <programlisting>#!/bin/sh
 
 mkfifo /tmp/waldo
 systemd-notify --ready --status="Waiting for data…"
 
 while : ; do
-        read a &lt; /tmp/waldo
+        read -r a &lt; /tmp/waldo
         systemd-notify --status="Processing $a"
 
         # Do something with $a …