Explicit argument names

scrapy/core/downloader/handlers/http10.py

@@ -29,7 +29,7 @@ class HTTP10DownloadHandler:
         host, port = to_unicode(factory.host), factory.port
         if factory.scheme == b'https':
             client_context_factory = create_instance(
-                self.ClientContextFactory,
+                objcls=self.ClientContextFactory,
                 settings=self._settings,
                 crawler=self._crawler,
             )

scrapy/core/downloader/handlers/http11.py

@@ -41,7 +41,7 @@ class HTTP11DownloadHandler:
         # try method-aware context factory
         try:
             self._contextFactory = create_instance(
-                self._contextFactoryClass,
+                objcls=self._contextFactoryClass,
                 settings=settings,
                 crawler=crawler,
                 method=self._sslMethod,
@@ -49,7 +49,7 @@ class HTTP11DownloadHandler:
         except TypeError:
             # use context factory defaults
             self._contextFactory = create_instance(
-                self._contextFactoryClass,
+                objcls=self._contextFactoryClass,
                 settings=settings,
                 crawler=crawler,
             )

scrapy/core/downloader/handlers/s3.py

@@ -68,7 +68,11 @@ class S3DownloadHandler:
             except Exception as ex:
                 raise NotConfigured(str(ex))
 
-        _http_handler = create_instance(httpdownloadhandler, settings, crawler)
+        _http_handler = create_instance(
+            objcls=httpdownloadhandler,
+            settings=settings,
+            crawler=crawler,
+        )
         self._download_http = _http_handler.download_request
 
     @classmethod