updated for version 7.3.964

Problem:    Python: not so easy to access tab pages.
Solution:   Add window.tabpage, make window.number work with non-current tab
            pages. (ZyX)

runtime/doc/if_pyth.txt

@@ -433,8 +433,9 @@ Window attributes are:
 				This is zero in case it cannot be determined
 				(e.g. when the window object belongs to other
 				tab page).
- 	row, col (read-only)	On-screen window position in display cells.
+	row, col (read-only)	On-screen window position in display cells.
 				First position is zero.
+	tabpage (read-only)	Window tab page.
 
 The height attribute is writable only if the screen is split horizontally.
 The width attribute is writable only if the screen is split vertically.
@@ -490,7 +491,7 @@ if the `:py3` command is working: >
 <							*:py3file*
 The |:py3file| command works similar to |:pyfile|.
 
-							*:py3do*
+							*:py3do* *E863*
 :[range]py3do {body}	Execute Python function "def _vim_pydo(line, linenr):
 			{body}" for each line in the [range], with the
 			function arguments being set to the text of each line