fix Gdn/Gdp to make diff in the Gstatus window
fix Gdn/Gdp to make diff in the Gstatus window

in 2019-Jan, the interface for Gstatus has been changed (now use
simplifed message) and also Gedit is not always editing in the same
window so that the ds/dv/D mappings int the Gstatus window does not work
properly

liushapku/zsh,liushapku/zsh,liushapku/zsh,liushapku/zsh