Exclude patches from trailing whitespace check

.github/format.sh

@@ -33,7 +33,7 @@ do
       # Check if tab are present.
       egrep -Hn $'\t' $FILE && TAB_FOUND=1 || true
       ;;
-    *.pdf|*.hdf5|*.jpg|*.png|*.ppt|*.pptx|*.ipe)
+    *.pdf|*.hdf5|*.jpg|*.patch|*.png|*.ppt|*.pptx|*.ipe)
       # Exclude some binary files types,
       # others can be excluded as needed.
       ;;