wkhtmltopdf: Also support 'htm' as source_format ('text/html' mimetype maps to...

wkhtmltopdf: Also support 'htm' as source_format ('text/html' mimetype maps to both 'htm' and 'html' extensions).

cloudooo/handler/wkhtmltopdf/tests/testWkhtmltopdfServer.py

@@ -35,6 +35,7 @@ class TestServer(TestCase):
     return [
       (join('data', 'test_with_png_dataurl.html'), "html", "pdf", "application/pdf"),
       (join('data', 'test_with_script.html'), "html", "pdf", "application/pdf"),
+      (join('data', 'test_with_script.html'), "htm", "pdf", "application/pdf"),
     ]
 
   def testConvertHtmltoPdf(self):

cloudooo/manager.py

@@ -123,7 +123,7 @@ class Manager(object):
     #     use the conversion_kw in a possible interoperable way between all
     #     "html to pdf" handlers.
     if (conversion_kw and
-        source_format == "html" and
+        source_format in ("htm", "html") and
         destination_format == "pdf"):
       handler_class = WkhtmltopdfHandler
     else: