Fix default dir truncation strategy
Fix default dir truncation strategy

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