How to get Safari to reopen the last closed tab

With the new macOS Sierra, it is possible to use the keyboard shortcut ⌘⇧T to reopen the last closed tab – à la Chrome and other browsers.

The previous shortcut, ⌘Z, allowed you to reopen closed tabs, but was more of a "general purpose" button which allowed you to reopen closed tabs, but also to undo other actions. The new shortcut is specifically meant to reopen closed tabs.

From http://seanscus.blogspot.com/2012/08/completely-reset-safari.html

Open a terminal and enter the following commands to fully wipe out all of your old Safari settings:

mv ~/Library/Safari ~/Desktop/Safari-`date +%Y%m%d%H%M%S`; \ rm -Rf ~/Library/Caches/Apple\ -\ Safari\ -\ Safari\ Extensions\ Gallery; \ rm -Rf ~/Library/Caches/Metadata/Safari; \ rm -Rf ~/Library/Caches/com.apple.Safari; \ rm -Rf ~/Library/Caches/com.apple.WebKit.PluginProcess; \ rm -Rf ~/Library/Cookies/Cookies.binarycookies; \ rm -Rf ~/Library/Preferences/Apple\ -\ Safari\ -\ Safari\ Extensions\ Gallery; \ rm -Rf ~/Library/Preferences/com.apple.Safari.LSSharedFileList.plist; \ rm -Rf ~/Library/Preferences/com.apple.Safari.RSS.plist; \ rm -Rf ~/Library/Preferences/com.apple.Safari.plist; \ rm -Rf ~/Library/Preferences/com.apple.WebFoundation.plist; \ rm -Rf ~/Library/Preferences/com.apple.WebKit.PluginHost.plist; \ rm -Rf ~/Library/Preferences/com.apple.WebKit.PluginProcess.plist; \ rm -Rf ~/Library/PubSub/Database; \ rm -Rf ~/Library/Saved\ Application\ State/com.apple.Safari.savedState