Callouts break line continuations

Languages like bash and python require `\` on the end of a line to signal that the next line is part of this line. Well, python only requires it sometimes and bash only requires it most of the time, but *sometimes* you need to stick the darn `\` on the end of the line. The trouble is that if you have a callout after it like `\ <1>` then the html that gets rendered includes the space after the `\` which breaks the line continuation, causing frustrating failures. I bet we could do something about this. I don't know what, but I think we *should* do something about this.