Vimスクリプト(:tab)

:tabを使います。
ヘルプ。

:[count]tab {cmd}                                       *:tab*
                Execute {cmd} and when it opens a new window open a new tab
                page instead.  Doesn't work for |:diffsplit|, |:diffpatch|,
                |:execute| and |:normal|.
                If [count] is given the new tab page appears after the tab
                page [count] otherwise the new tab page will appear after the
                current one. 
                Examples:  
                    :tab split      " opens current buffer in new tab page
                    :tab help gt    " opens tab page with help for "gt"
                    :.tab help gt   " as above
                    :+tab help      " opens tab page with help after the next
                                    " tab page
                    :-tab help      " opens tab page with help before the
                                    " current one
                    :0tab help      " opens tab page with help before the
                                    " first one 
                    :$tab help      " opens tab page with help after the last
                                    " one

タブを新規に開いて、コマンドを実行してくれるコマンドのようです。
使い道は、helpを別タブで開きたいとき、しか思いつきません。

使ってみます。

/tmp $ vim test_1.txt

:tab help

helpは省略して書けるので、:tab hでも同じことができますね。

 
:tab h :tab