Terminal Search For Non-Ascii Characters

Sometimes compilers of all sorts gives you trouble for non-ascii characters usually without no feedback as to where in the code they are located. One can then do a directory or file search for the pesky non-ascii characters. I found this discussion on Stack Overflow. What you do is a grep with regular expression that captures all non-ascii characters. To do this over for example your site directory like this,

grep --color='auto' -P -n '[^\x00-\x7F]' _site/*

or on OSX

pcregrep --color='auto' -n "[^\x00-\x7F]" _site/* 

Or you can just do a regular expression search for [^\x00-\x7F] in your favorite editor.