Shows backslash used to force line break

[w4jbm]

In markdown documents where the backslash character is used to force a line break, the backslash character is displayed in the PDF.

Line 1\
Line 2

Will normally display as:

Line 1
Line 2

But when rendered to a PDF, it is showing the backslash that was used to force the line break.

The file was was trying to print is found here:

https://github.com/w4jbm/6502/blob/master/OSI_gc_bug.md

A very minor annoyance and I know there are other ways I can force a line break (like a double space at the end of the line) that would probably allow me to work around this.

[travs]

This is being tracked over here: showdownjs/showdown#394

It will be incorporated when it's solved upstream.