Fix links to importlib.abc.Traversable

Closes python#93610

This also improves the error message when someone uses the older `make serve`
command of `Docs/Makefile`.

Doc/Makefile

@@ -219,7 +219,7 @@ check:
 	$(SPHINXLINT) --enable default-role ../Misc/NEWS.d/next/
 
 serve:
-	@echo "The serve target was removed, use htmlview instead (see bpo-36329)"
+	@echo "The serve target was removed, use `make htmlview` instead (see bpo-36329)"
 
 # Targets for daily automated doc build
 # By default, Sphinx only rebuilds pages where the page content has changed.

Doc/library/importlib.resources.rst

@@ -61,7 +61,7 @@ The following functions are available.
 
 .. function:: files(package)
 
-    Returns an :class:`importlib.resources.abc.Traversable` object
+    Returns an :class:`importlib.abc.Traversable` object
     representing the resource container for the package (think directory)
     and its resources (think files). A Traversable may contain other
     containers (think subdirectories).
@@ -73,7 +73,7 @@ The following functions are available.
 
 .. function:: as_file(traversable)
 
-    Given a :class:`importlib.resources.abc.Traversable` object representing
+    Given a :class:`importlib.abc.Traversable` object representing
     a file, typically from :func:`importlib.resources.files`, return
     a context manager for use in a :keyword:`with` statement.
     The context manager provides a :class:`pathlib.Path` object.