Cleanup a couple of comments left on PR 28775 post-merge. (GH-29079)

(cherry picked from commit 1dfac27)

Co-authored-by: Gregory P. Smith <[email protected]>

Author: miss-islington

Lib/asyncio/unix_events.py

@@ -1383,7 +1383,7 @@ def add_child_handler(self, pid, callback, *args):
     def remove_child_handler(self, pid):
         # asyncio never calls remove_child_handler() !!!
         # The method is no-op but is implemented because
-        # abstract base classes requires it
+        # abstract base classes require it.
         return True
 
     def attach_loop(self, loop):

Lib/tkinter/test/test_ttk/test_widgets.py

@@ -971,7 +971,7 @@ def test_add_and_hidden(self):
         tabs = self.nb.tabs()
 
         curr = self.nb.index('current')
-        # verify that the tab gets read at its previous position
+        # verify that the tab gets re-added at its previous position
         child2_index = self.nb.index(self.child2)
         self.nb.hide(self.child2)
         self.nb.add(self.child2)