*g:CommandTAcceptSelectionTabCommand*
|g:CommandTAcceptSelectionTabCommand| string (default: 'CommandTOpen tabe')
The Vim command that will be used to open a selection from the match
listing in a new tab (via |g:CommandTAcceptSelectionSplitMap|).
See also, |:CommandTOpen|.
See https://github.com/wincent/command-t/blob/master/doc/command-t.txt#L965-L986:
it refers to
g:CommandTAcceptSelectionSplitMap
.