Minor cleanup of comments, typing and gitignore

gui.py

@@ -474,10 +474,10 @@ class LoginForm:
                 self._pass_entry.get(),
                 self._token_entry.get().strip(),
             )
-            # basic input data validation
+            # basic input data validation: 3-25 characters in length, only ascii and underscores
             if (
-                not 3 <= len(login_data.username) <= 25  # 3-25 characters in length
-                and re.match(r'^[a-zA-Z0-9_]+$', login_data.username)  # only ascii and underscores
+                not 3 <= len(login_data.username) <= 25
+                and re.match(r'^[a-zA-Z0-9_]+$', login_data.username)
             ):
                 self.clear(login=True)
                 continue