bug fix: escape backquote; fixes #404

internal/p10k.zsh

@@ -468,7 +468,7 @@ _p9k_escape_style() {
 }
 
 _p9k_escape() {
-  [[ $1 == *["~!#\$^&*()\\\"'<>?{}[]"]* ]] && _p9k_ret="\${(Q)\${:-${(qqq)${(q)1}}}}" || _p9k_ret=$1
+  [[ $1 == *["~!#\`\$^&*()\\\"'<>?{}[]"]* ]] && _p9k_ret="\${(Q)\${:-${(qqq)${(q)1}}}}" || _p9k_ret=$1
 }
 
 # * $1: Name of the function that was originally invoked.
@@ -1496,7 +1496,7 @@ prompt_dir() {
           if [[ $pair == ${mtime:-x}:* ]]; then
             parts[i]=${pair#*:}
           else
-            [[ $sub != *["~!#\$^&*()\\\"'<>?{}[]"]* ]]
+            [[ $sub != *["~!#\`\$^&*()\\\"'<>?{}[]"]* ]]
             local -i q=$?
             if [[ -n $_POWERLEVEL9K_SHORTEN_FOLDER_MARKER &&
                   -n $parent/$sub/${~_POWERLEVEL9K_SHORTEN_FOLDER_MARKER}(#qN) ]]; then
@@ -1525,7 +1525,7 @@ prompt_dir() {
           parent+=/$sub
         done
         for ((; i <= $#parts; ++i)); do
-          [[ $parts[i] == *["~!#\$^&*()\\\"'<>?{}[]"]* ]] && parts[i]='${(Q)${:-'${(qqq)${(q)parts[i]}}'}}'
+          [[ $parts[i] == *["~!#\`\$^&*()\\\"'<>?{}[]"]* ]] && parts[i]='${(Q)${:-'${(qqq)${(q)parts[i]}}'}}'
           parts[i]+=$'\2'
         done
         [[ -n $key ]] && _p9k_cache_ephemeral_set "$key" "${parts[@]}"
@@ -5473,7 +5473,7 @@ _p9k_must_init() {
     [[ $sig == $_p9k__param_sig ]] && return 1
     _p9k_deinit
   fi
-  _p9k__param_pat=$'v16\1'${ZSH_VERSION}$'\1'${ZSH_PATCHLEVEL}$'\1'
+  _p9k__param_pat=$'v17\1'${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'