patch 9.1.0205: Cannot use modifiers before :-Ntabmove

Problem:  Cannot use modifiers before :-Ntabmove.
Solution: Check backwards from the command instead of checking from the
          start of the command line. Slightly adjust docs to make them
          more consistent (zeertzjq).

closes: #14289

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/tabpage.txt b/runtime/doc/tabpage.txt
index a98fe95..a922604 100644
--- a/runtime/doc/tabpage.txt
+++ b/runtime/doc/tabpage.txt
@@ -1,4 +1,4 @@
-*tabpage.txt*   For Vim version 9.1.  Last change: 2022 Feb 02
+*tabpage.txt*   For Vim version 9.1.  Last change: 2024 Mar 25
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -196,7 +196,7 @@
 		    :1tabnext	" go to the first tab page
 		    :$tabnext	" go to the last tab page
 		    :tabnext $	" as above
-		    :tabnext #  " go to the last accessed tab page
+		    :tabnext #	" go to the last accessed tab page
 		    :tabnext -	" go to the previous tab page
 		    :tabnext -1	" as above
 		    :tabnext +	" go to the next tab page
@@ -248,13 +248,12 @@
 		Move the current tab page to after tab page N.  Use zero to
 		make the current tab page the first one.  N is counted before
 		the move, thus if the second tab is the current one,
-		`:tabmove 1` and `:tabmove 2`  have no effect.
+		`:tabmove 1` and `:tabmove 2` have no effect.
 		Without N the tab page is made the last one. >
 		    :.tabmove	" do nothing
 		    :-tabmove	" move the tab page to the left
 		    :+tabmove	" move the tab page to the right
-		    :0tabmove	" move the tab page to the beginning of the tab
-				" list
+		    :0tabmove	" move the tab page to the first
 		    :tabmove 0	" as above
 		    :tabmove	" move the tab page to the last
 		    :$tabmove	" as above