Show links to notebooks in sphinx-gallery examples (#3838)

docs/source/_static/css/custom_torchvision.css

+/* This rule (and possibly this entire file) should be removed once
+https://github.com/pytorch/pytorch_sphinx_theme/issues/125 is fixed.
+
+We override the rule so that the links to the notebooks aren't hidden in the
+gallery examples. pytorch_sphinx_theme is supposed to customize those links so
+that they render nicely (look at the nice links on top of the tutorials
+examples) but it doesn't work for repos that are not the tutorial repo, and in
+torchvision it just hides the links. So we have to put them back here */
+article.pytorch-article .sphx-glr-download-link-note.admonition.note,
+article.pytorch-article .reference.download.internal, article.pytorch-article .sphx-glr-signature {
+  display: block;
+}
\ No newline at end of file

docs/source/conf.py

@@ -137,6 +137,11 @@ html_logo = '_static/img/pytorch-logo-dark.svg'
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ['_static']
 
+# TODO: remove this once https://github.com/pytorch/pytorch_sphinx_theme/issues/125 is fixed
+html_css_files = [
+    'css/custom_torchvision.css',
+]
+
 # -- Options for HTMLHelp output ------------------------------------------
 
 # Output file base name for HTML help builder.