do not shorten the last dir in truncate_to_unique

powerlevel9k.zsh-theme

@@ -897,7 +897,7 @@ prompt_dir() {
     truncate_to_unique)
       local parent="${PWD%/${(pj./.)parts[2,-1]}}" dir
       local -i i=2
-      for (( ; i <= $#parts; ++i )); do
+      for (( ; i < $#parts; ++i )); do
         local dir=$parts[i]
         local -i j=1
         for (( ; j <= $#dir; ++j )); do