bpo-36329: Declare the version of Python to use for Tools/scripts/serve.py (#12385)

* bpo-36329: Declare the version of Python to use for Tools/scripts/serve.py

* Add the blurb entry

Doc/Makefile

@@ -174,7 +174,7 @@ check:
 	$(PYTHON) tools/rstlint.py -i tools -i $(VENVDIR) -i README.rst
 
 serve:
-	../Tools/scripts/serve.py build/html
+	$(PYTHON) ../Tools/scripts/serve.py build/html
 
 # Targets for daily automated doc build
 # By default, Sphinx only rebuilds pages where the page content has changed.

Misc/NEWS.d/next/Documentation/2019-03-17-20-01-41.bpo-36329.L5dJPD.rst

+Declare the path of the Python binary for the usage of
+``Tools/scripts/serve.py`` when executing ``make -C Doc/ serve``.
+Contributed by Stéphane Wirtel