Make sure prompt_cr is set
Make sure prompt_cr is set

Fixes #511

bhilburn/powerlevel9k,natemccurdy/powerlevel9k,natemccurdy/powerlevel9k,rjorgenson/powerlevel9k,rjorgenson/powerlevel9k,bhilburn/powerlevel9k,dritter/powerlevel9k,dritter/powerlevel9k