Improve zsh prompt

https://speakerdeck.com/jmblog/hurontoendoenziniafalsetamefalse-dotfiles

diff --git a/dot.zshenv b/dot.zshenv
index ed3e51e..87ddabc 100644
--- a/dot.zshenv
+++ b/dot.zshenv
@@ -12,7 +12,7 @@ autoload -Uz colors
 colors

 PROMPT="
-%{[33m%}[%~]%{[m%}
+%{[33m%}%~%{[m%} \$(get_vsc_info)
 %% "
 RPROMPT=''
 SPROMPT="correct: %R -> %r ? "
@@ -73,7 +73,7 @@ function get_vsc_info {
 }

 update_rprompt () {
-  RPROMPT=`get_vsc_info`
+  # RPROMPT=$(get_vsc_info)
 }

 precmd() {