diff -rupN --no-dereference Pillow-9.1.0/docs/Makefile Pillow-9.1.0-new/docs/Makefile
--- Pillow-9.1.0/docs/Makefile	2022-04-01 09:48:32.000000000 +0200
+++ Pillow-9.1.0-new/docs/Makefile	2022-04-05 11:57:42.212121016 +0200
@@ -46,7 +46,7 @@ install-sphinx:
 
 html:
 	$(MAKE) install-sphinx
-	$(SPHINXBUILD) -b html -W --keep-going $(ALLSPHINXOPTS) $(BUILDDIR)/html
+	$(SPHINXBUILD) -b html --keep-going $(ALLSPHINXOPTS) $(BUILDDIR)/html
 	@echo
 	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."