It was a while ago now, but I remember copying the code out to a controlled isolated environment on my local machine, picking the first line and making sure it

It was a while ago now, but I remember copying the code out to a controlled isolated environment on my local machine, picking the first line and making sure it reproduced. After that it was a matter of just going through the usual steps of working out why something isn't working. I think in this instance I actually ended up manually retyping the code, and when getting "identical" code that worked that was when the penny dropped and I realised something was not what it seemed. If you paste suspect characters into something like http://unicode-table.com/en/ http://unicode-table.com/en/ it will tell you right away what it really is.