GitLab

* doc/emacs/buffers.texi: Document widen/contracting commands in
tabulated list mode.
* lisp/emacs-lisp/tabulated-list.el (tabulated-list-mode-map): Add
keystrokes.
(tabulated-list-widen-current-column): New command.
(tabulated-list-narrow-current-column): Ditto.  The code was
written by Boruch Baum and then tweaked by Drew Adams (bug#32106)
before some white-space changes before the commit.