Attempt to fix Travis error

powerlevel9k.zsh-theme

@@ -864,11 +864,11 @@ prompt_dir() {
   local bd dir_state_foreground dir_state_user_foreground
   [[ "${(L)POWERLEVEL9K_DIR_PATH_HIGHLIGHT_BOLD}" = "true" ]] && bd="%B" || bd=""
 
-  local dir_state_user_foreground="POWERLEVEL9K_DIR_${current_state}_FOREGROUND"
+  local dir_state_user_foreground=POWERLEVEL9K_DIR_${current_state}_FOREGROUND
-  local dir_state_foreground="${(P)dir_state_user_foreground}"
+  local dir_state_foreground=${(P)dir_state_user_foreground}
-  [[ -z "${dir_state_foreground}" ]] && dir_state_foreground="${DEFAULT_COLOR}"
+  [[ -z ${dir_state_foreground} ]] && dir_state_foreground="${DEFAULT_COLOR}"
 
-  if [[ -n "${POWERLEVEL9K_DIR_PATH_HIGHLIGHT_FOREGROUND}" ]]; then
+  if [[ -n ${POWERLEVEL9K_DIR_PATH_HIGHLIGHT_FOREGROUND} ]]; then
     if [[ $path_opt == "/" || $path_opt == "~" || $(dirname $path_opt) == "/" || ${POWERLEVEL9K_DIR_OMIT_FIRST_CHARACTER} ]]; then
       current_path="$bd%F{$POWERLEVEL9K_DIR_PATH_HIGHLIGHT_FOREGROUND}$current_path%F{$dir_state_foreground}%b"
     else
@@ -876,7 +876,7 @@ prompt_dir() {
     fi
   fi
 
-  if [[ -n "${POWERLEVEL9K_DIR_PATH_SEPARATOR_FOREGROUND}" && $path_opt != "/" ]]; then
+  if [[ -n ${POWERLEVEL9K_DIR_PATH_SEPARATOR_FOREGROUND} && $path_opt != "/" ]]; then
     current_path="$( echo "${current_path}" | sed "s/\//%F{$POWERLEVEL9K_DIR_PATH_SEPARATOR_FOREGROUND}\/%F{$dir_state_foreground}/g")"
   fi