zsh: save and restore a prompt set with zsh' promptinit
zsh: save and restore a prompt set with zsh' promptinit

Zsh has a framework for Prompt plugins.
(see /usr/share/zsh/functions/Prompts/promptinit)

If a prompt has been enabled when LiquidPrompt is loaded, we save the
prompt and restore it when prompt_off is called by the user.

joshuarubin/dotfiles,tsbarnes/liquidprompt,laurentbardin/liquidprompt,smadhueagle/liquidprompt,jaesivsm/liquidprompt,joshuarubin/dotfiles,BobHood/liquidprompt,nojhan/liquidprompt,dtschan/liquidprompt,pkkolos/liquidprompt,alexprengere/liquidprompt,dpilone/liquidprompt,milouse/liquidprompt,dan-cleinmark/liquidprompt,joshuarubin/dotfiles,joshuarubin/dotfiles