[zsh] added back accidentally deleted function

+ cleaned up left prompt and rprompt

zsh/prompt.zsh

@@ -23,6 +23,12 @@ unpushed() {
   /usr/bin/git cherry -v @{upstream} 2>/dev/null
 }
 
+git_prompt_info() {
+ ref=$(/usr/bin/git symbolic-ref HEAD 2>/dev/null) || return
+# echo "(%{\e[0;33m%}${ref#refs/heads/}%{\e[0m%})"
+ echo "${ref#refs/heads/}"
+}
+
 need_push() {
   if [[ $(unpushed) == "" ]]
   then
@@ -36,5 +42,5 @@ directory_name(){
   echo "%{$fg_bold[cyan]%}%1/%\/%{$reset_color%}"
 }
 
-export PROMPT=$'in $(directory_name) $(git_dirty)$(need_push)\n➜ '
+export PROMPT=$'$(directory_name) %{$fg_bold[cyan]%}➜%{$reset_color%} '
 export RPROMPT=$'$(git_dirty)$(need_push)'