gh-59551: Add a stub page for the old library/dialog.html URL

Add support for the "*" marker in Doc/tools/removed-ids.txt, which
excludes all IDs of a page from the check-html-ids.py check.

Author: serhiy-storchaka

Doc/library/dialog.rst

@@ -0,0 +1,15 @@
+:orphan:
+
+.. This page is retained solely for existing links to library/dialog.html.
+   Direct readers to the renamed page instead.
+
+Tkinter dialogs
+===============
+
+This page has been renamed.  The modules it documented are now described in
+:doc:`./tkinter.dialogs`:
+
+* :mod:`tkinter.simpledialog`
+* :mod:`tkinter.filedialog`
+* :mod:`tkinter.commondialog`
+* :mod:`tkinter.dialog`

Doc/tools/check-html-ids.py

@@ -83,6 +83,8 @@ def do_check(baseline, checked, excluded, *, verbose_print):
                 print(f'{name}: (page missing)')
                 print()
         else:
+            if (name, '*') in excluded:
+                continue
             missing_ids = set(baseline_ids) - set(checked_ids)
             if missing_ids:
                 missing_ids = {

Doc/tools/removed-ids.txt

@@ -1,4 +1,6 @@
 # HTML IDs excluded from the check-html-ids.py check.
+# Use "*" instead of an ID to exclude all IDs of a page, and
+# "(page missing)" to allow the page itself to be removed.
 
 # Remove from here in 3.16
 c-api/allocation.html: deprecated-aliases
@@ -84,4 +86,4 @@ reference/expressions.html: generator.send
 reference/expressions.html: generator.throw
 
 # Renamed to library/tkinter.dialogs.html
-library/dialog.html: (page missing)
+library/dialog.html: *