Some "responsive" web e-mail clients are too aggressive and wrap the text within <pre> tags. I ran into this with the Yahoo! mail client on Android. This PR prevents this issue.
I like to look at my email and in a second see what is wrong! Sometimes I get a Warning or Critical Sign and I have to look at all the table, or open my scrip, to see what parameter is out off bounds. So I added a small char to warn me about what column triggered the error/warning.