last: edited to stick to the convetion and added more options

pages/common/last.md

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+# last 
+
+> View the last logged in users
+
+- view last logins, their duration  and other information as read from /var/log/wtmp
+
+`last`
+
+- specify how many of the last logins to show
+
+`last -n {{login_count}}`
+
+- view full login times and dates 
+
+`last -F`
+
+- view the last login by a specific user
+
+`last {{user_name}}`
+
+- view the last reboot (last login of the pseudo user reboot)
+
+`last reboot`
+
+- view the last shutdown (last login of the pseudo user shutdown)
+
+`last shutdown`