fix typos and missing type annotations (thanks @JGuinegagne)

Author: dlqqq

jupyter_server_documents/rooms/yroom.py

@@ -184,7 +184,7 @@ async def emit_load_event():
     def _init_ydoc(self) -> pycrdt.Doc:
         """
         Initializes a YDoc, automatically binding its `_on_ydoc_update()`
-        observer to `self._ydoc_subscription`. The observer can removed via
+        observer to `self._ydoc_subscription`. The observer can be removed via
         `ydoc.unobserve(self._ydoc_subscription)`.
         """
         self._ydoc = pycrdt.Doc()
@@ -698,7 +698,7 @@ def handle_inband_deletion(self) -> None:
         self.stop(close_code=4002, immediately=True)
 
 
-    def stop(self, close_code: int = 1001, immediately: bool = False):
+    def stop(self, close_code: int = 1001, immediately: bool = False) -> None:
         """
         Stops the YRoom. This method:
          
@@ -757,7 +757,7 @@ def stop(self, close_code: int = 1001, immediately: bool = False):
         self._stopped = True
 
 
-    def _reset_ydoc(self):
+    def _reset_ydoc(self) -> None:
         """
         Deletes and re-initializes the YDoc, awareness, and JupyterYDoc. This
         frees the memory occupied by their histories.
@@ -790,7 +790,7 @@ def updated(self) -> bool:
         return self._updated
 
 
-    def restart(self, close_code: int = 1001, immediately: bool = False):
+    def restart(self, close_code: int = 1001, immediately: bool = False) -> None:
         """
         Restarts the YRoom. This method re-initializes & reloads the YDoc,
         Awareness, and the JupyterYDoc. After this method is called, this

jupyter_server_documents/session_manager.py

@@ -134,7 +134,7 @@ async def create_session(
         return session_model
 
 
-    async def update_session(self, session_id, **update) -> None:
+    async def update_session(self, session_id: str, **update) -> None:
         """
         Updates the session identified by `session_id` using the keyword
         arguments passed to this method. Each keyword argument should correspond

jupyter_server_documents/websockets/clients.py

@@ -198,7 +198,7 @@ def close_all(self, close_code: int):
         for client in clients:
             client.websocket.close(code=close_code)
 
-    def stop(self, close_code: int = 1001):
+    def stop(self, close_code: int = 1001) -> None:
         """
         Closes all Websocket connections with the given close code, removes all
         clients from this group. Future calls to `add()` are ignored until the
@@ -214,14 +214,14 @@ def stop(self, close_code: int = 1001):
         self._stopped = True
 
     @property
-    def stopped(self):
+    def stopped(self) -> bool:
         """
         Returns whether the client group is stopped.
         """
 
         return self._stopped
 
-    def restart(self, close_code: int = 1001):
+    def restart(self, close_code: int = 1001) -> None:
         """
         Restarts the client group by setting `stopped` to `False`. Future calls
         to `add()` will *not* be ignored after this method is called.