patch 8.2.1413: previous tab page not usable from an Ex command

Problem:    Previous tab page not usable from an Ex command.
Solution:   Add the "#" argument for :tabnext et al. (Yegappan Lakshmanan,
            closes #6677)
diff --git a/runtime/doc/tabpage.txt b/runtime/doc/tabpage.txt
index 1d8c208..65ae599 100644
--- a/runtime/doc/tabpage.txt
+++ b/runtime/doc/tabpage.txt
@@ -142,6 +142,7 @@
 		    :tabclose +	    " close the next tab page
 		    :tabclose 3	    " close the third tab page
 		    :tabclose $	    " close the last tab page
+		    :tabclose #     " close the last accessed tab page
 <
 							*:tabo* *:tabonly*
 :tabo[nly][!]	Close all other tab pages.
@@ -170,6 +171,8 @@
 				    " one
 		    :tabonly 1	    " close all tab pages except the first one
 		    :tabonly $	    " close all tab pages except the last one
+		    :tabonly #	    " close all tab pages except the last
+				    " accessed one
 
 
 SWITCHING TO ANOTHER TAB PAGE:
@@ -192,6 +195,7 @@
 		    :+2tabnext	" go to the two next tab page
 		    :1tabnext	" go to the first tab page
 		    :$tabnext	" go to the last tab page
+		    :tabnext #  " go to the last accessed tab page
 		    :tabnext $	" as above
 		    :tabnext -	" go to the previous tab page
 		    :tabnext -1	" as above
@@ -255,6 +259,8 @@
 		    :tabmove	" move the tab page to the last
 		    :$tabmove	" as above
 		    :tabmove $	" as above
+		    :tabmove #  " move the tab page after the last accessed
+				" tab page
 
 :tabm[ove] +[N]
 :tabm[ove] -[N]