Auto merge of #1377 - nruth:patch-1, r=locks
Auto merge of #1377 - nruth:patch-1, r=locks

revise acceptance.md helper arguments examples

I just used this for the first time, and the guide is great, but it's not clear right now whether assert is injected, required, etc. I think changing the examples a little will help.

tleskin/guides,MarkMT/guides,skaterdav85/guides,ubuntuvim/guides,nicobot/guides,knownasilya/guides,bmac/guides,MarkMT/guides,ubuntuvim/guides,skaterdav85/guides,knownasilya/guides,knownasilya/guides,tleskin/guides,davidpett/guides,jkarsrud/guides,bmac/guides,nicobot/guides,jkarsrud/guides,skaterdav85/guides,davidpett/guides,HeroicEric/guides,nicobot/guides,tleskin/guides,jkarsrud/guides,ubuntuvim/guides,HeroicEric/guides,davidpett/guides,MarkMT/guides,bmac/guides,MarkMT/guides,bmac/guides,knownasilya/guides,HeroicEric/guides,ubuntuvim/guides,davidpett/guides,skaterdav85/guides,jkarsrud/guides