Add the art of command line tip function in aliases

dotfiles/shell/aliases

@@ -21,3 +21,12 @@ alias visudo='export EDITOR=$EDITOR && sudo -E visudo'
 alias :q=' exit'
 alias :x=' exit'
 alias cd..='cd ..'
+
+taocl_tip() {
+    curl -s https://raw.githubusercontent.com/jlevy/the-art-of-command-line/master/README.md |
+        sed '/cowsay[.]png/d' |
+        pandoc -f markdown -t html |
+        xmlstarlet fo --html --dropdtd |
+        xmlstarlet sel -t -v "(html/body/ul/li[count(p)>0])[$RANDOM mod last()+1]" |
+        xmlstarlet unesc | fmt -80 | iconv -t US
+}