docs: enable early abort on example error

sphinx/Makefile

@@ -21,9 +21,4 @@ help:
 # Catch-all target: route all unknown targets to Sphinx using the new
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
 %: Makefile
-	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
-
-html_abort_on_example_error:
-    $(SPHINXBUILD) -D abort_on_example_error=1 -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
-    @echo
-    @echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

sphinx/conf.py

@@ -93,6 +93,7 @@ def reset_mpl(gallery_conf, fname):
     "doc_module": "skore",
     "default_thumb_file": "./_static/images/[email protected]",
     "reset_modules": (reset_mpl, "seaborn"),
+    "abort_on_example_error": True,
 }
 
 # intersphinx configuration