This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I don't like it either, truth be told, but I have never looked into whether there might be a way to remove it. It's related to the how the line numbers are rendered, and I like those very much, and wouldn't want to do without them.
In any case, yes, if you want to copy code, use "view plain".