instanceinfo.sh: Fixed HTML stripper.

The leading and trailing " were supposed to be removed, but only the
leading one was removed.

instanceinfo.sh

@@ -16,7 +16,7 @@ fi
 function striphtml()
 {
     local extract="${*}"
-    echo "${extract}" | sed 's/\\u003c/</g' | sed 's/\\u003e/>/g' | sed -E 's/<[^>]+>//g' | sed 's/\\r\\n/ /g' | sed -E 's/(^"|"$)//'
+    echo "${extract}" | sed 's/\\u003c/</g' | sed 's/\\u003e/>/g' | sed -E 's/<[^>]+>//g' | sed 's/\\r\\n/ /g' | sed -E 's/(^"|"$)//g'
 }
 
 function main()