code block test 19oct2016

### code block
print '3 backticks or'
print 'indent 4 spaces'

the three back-tic code block is unvailable in the perl markdown and multimarkdown modules. i need to add this format.

# code block
print '3 backticks or'
print 'indent 4 spaces'

i created my own fence command by surrounding the block with fence. and fence.. commands. i think my fence command is the only custom formatting command that i have in my wren code. usually, i have at least a handful of my own custom formatting commands. i simplified. i think that i also support my custom br. command to provide a line break.

# code block
print '3 backticks or'
print 'indent 4 spaces'