Build everything with Python 3

Makefile

@@ -1,6 +1,6 @@
 update:
-	python ./generate-download
-	python ./update-copyright
+	python3 ./generate-download
+	python3 ./update-copyright
 
 .PHONY: update
 

update-copyright

@@ -13,7 +13,7 @@ year = str(datetime.datetime.now().year)
 for fn in glob.glob('*.html'):
     with io.open(fn, encoding='utf-8') as f:
         content = f.read()
-    newc = re.sub(ur'(?P<copyright>Copyright © 2006-)(?P<year>[0-9]{4})', u'Copyright © 2006-' + year, content)
+    newc = re.sub(u'(?P<copyright>Copyright © 2006-)(?P<year>[0-9]{4})', u'Copyright © 2006-' + year, content)
     if content != newc:
         tmpFn = fn + '.part'
         with io.open(tmpFn, 'wt', encoding='utf-8') as outf: