Fix gr.Interface() not to override the default title value

Author: whitphx

gradio/interface.py

@@ -337,7 +337,6 @@ def __init__(
         self.fn_durations = [0, 0]
         self.__name__ = getattr(fn, "__name__", "fn")
         self.live = live
-        self.title = title
 
         self.simple_description = utils.remove_html_tags(description)
         self.description = description

gradio/routes.py

@@ -1445,7 +1445,7 @@ def manifest_json():
             return ORJSONResponse(
                 content={
                     # NOTE: Required members: https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps/Guides/Making_PWAs_installable#required_manifest_members
-                    "name": app.get_blocks().title or "Gradio",
+                    "name": app.get_blocks().title,
                     "icons": [
                         {
                             "src": "static/img/logo192.svg",

test/test_interfaces.py

@@ -28,6 +28,10 @@ def captured_output():
 
 
 class TestInterface:
+    def test_default_title(self):
+        io = Interface(lambda x: x, "textbox", "label")
+        assert io.title == "Gradio"
+
     def test_close(self):
         io = Interface(lambda input: None, "textbox", "label")
         _, local_url, _ = io.launch(prevent_thread_lock=True)