bug fix: truncate_to_last didn't behave like %1~ in / and /foo

internal/p10k.zsh

@@ -1766,8 +1766,10 @@ prompt_dir() {
       fi
     ;;
     truncate_to_last)
-      fake_first=$(($#parts > 1))
-      parts[1,-2]=()
+      if [[ $#parts -gt 2 || $p[1] != / && $#parts -gt 1 ]]; then
+        fake_first=1
+        parts[1,-2]=()
+      fi
     ;;
     truncate_to_first_and_last)
       if (( shortenlen > 0 )); then
@@ -7017,7 +7019,7 @@ _p9k_must_init() {
     [[ $sig == $_p9k__param_sig ]] && return 1
     _p9k_deinit
   fi
-  _p9k__param_pat=$'v48\1'${ZSH_VERSION}$'\1'${ZSH_PATCHLEVEL}$'\1'
+  _p9k__param_pat=$'v49\1'${ZSH_VERSION}$'\1'${ZSH_PATCHLEVEL}$'\1'
   _p9k__param_pat+=$'${#parameters[(I)POWERLEVEL9K_*]}\1${(%):-%n%#}\1$GITSTATUS_LOG_LEVEL\1'
   _p9k__param_pat+=$'$GITSTATUS_ENABLE_LOGGING\1$GITSTATUS_DAEMON\1$GITSTATUS_NUM_THREADS\1'
   _p9k__param_pat+=$'$DEFAULT_USER\1${ZLE_RPROMPT_INDENT:-1}\1$P9K_SSH\1$__p9k_ksh_arrays'