More documentation fixes in tab-bar.el

More documentation fixes in tab-bar.el

* lisp/tab-bar.el (tab-bar-detach-tab, tab-bar-move-window-to-tab)
(tab-bar-new-tab-to, tab-bar-new-tab, tab-bar-close-tab-select)
(tab-bar-close-last-tab-choice, tab-bar-tab-pre-close-functions)
(tab-bar-close-tab, tab-bar-close-tab-by-name)
(tab-bar-close-other-tabs, tab-bar-rename-tab)
(tab-bar-rename-tab-by-name, tab-bar-move-tab-to-group)
(tab-bar-change-tab-group, tab-bar-close-group-tabs)
(tab-switcher-next-line, tab-switcher-prev-line)
(tab-switcher-unmark, tab-switcher-delete, tab-switcher-select)
(tab-bar-get-buffer-tab, display-buffer-in-tab)
(display-buffer-in-new-tab, switch-to-buffer-other-tab)
(find-file-other-tab, find-file-read-only-other-tab): Doc fixes.