Make taocl() more robust

Thanks to #533 @ResponSySS and @pr4j

Author: jlevy

README.md

@@ -376,10 +376,11 @@ A few examples of piecing together commands:
 ```sh
       function taocl() {
         curl -s https://raw.githubusercontent.com/jlevy/the-art-of-command-line/master/README.md |
+          sed '/cowsay[.]png/d' |
           pandoc -f markdown -t html |
           xmlstarlet fo --html --dropdtd |
           xmlstarlet sel -t -v "(html/body/ul/li[count(p)>0])[$RANDOM mod last()+1]" |
-          xmlstarlet unesc | fmt -80
+          xmlstarlet unesc | fmt -80 | iconv -t US
       }
 ```