update kennethreitz.zsh-theme

themes/kennethreitz.zsh-theme

 local return_code="%(?..%{$fg[red]%}%? ↵%{$reset_color%})"
 
-PROMPT='%{%}%{$fg[green]%}%c \
+PROMPT='$(virtualenv_prompt_info)%{%}%{$fg[green]%}%c \
 $(git_prompt_info)\
+\
 %{$fg[red]%}%(!.#.»)%{$reset_color%} '
 PROMPT2='%{$fg[red]%}\ %{$reset_color%}'
 RPS1='%{$fg[blue]%}%~%{$reset_color%} ${return_code} '
 
-ZSH_THEME_GIT_PROMPT_PREFIX="%{$reset_color%}:: %{$fg[yellow]%}("
+ZSH_THEME_GIT_PROMPT_PREFIX="%{$reset_color%}%{$fg[yellow]%}("
 ZSH_THEME_GIT_PROMPT_SUFFIX=")%{$reset_color%} "
 ZSH_THEME_GIT_PROMPT_CLEAN=""
 ZSH_THEME_GIT_PROMPT_DIRTY="%{$fg[red]%}*%{$fg[yellow]%}"
+ZSH_THEME_VIRTUAL_ENV_PROMPT_PREFIX="%{$reset_color%}%{%}%{$fg[blue]%}"
+ZSH_THEME_VIRTUAL_ENV_PROMPT_SUFFIX="!%{$reset_color%} "
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