Updates for how to source "mo" and then use it

When you source mo, it adds the "mo" function to the environment.

demo/using-arrays

@@ -1,7 +1,8 @@
 #!/bin/bash
 cd "$(dirname "$0")" # Go to the script's directory
 export ARRAY=( one two "three three three" four five )
-cat << EOF | . ../mo
+. ../mo
+cat << EOF | mo
 Here are the items in the array:
 {{#ARRAY}}
     * {{.}}