fixes the format

specs/waku/v2/waku-filter.md

@@ -54,7 +54,7 @@ frequent polling.
 
 # Security Consideration
 
-Note that while using `WakuFilter` allows light nodes to save bandwidth, it comes with a privacy cost in the sense that they need to disclose their liking topics to the full nodes to retrieve the relevant messages. 
+Note that while using `WakuFilter` allows light nodes to save bandwidth, it comes with a privacy cost in the sense that they need to disclose their liking topics to the full nodes to retrieve the relevant messages. Currently, anonymous subscription is not supported by the `WakuFilter`, however, potential solutions in this regard are sketched below in [Future Work](#future-work) section. 
 
 ## Protobuf
 
@@ -134,10 +134,10 @@ implementation, though a reasonable default is one minute.
 --- 
 # Future Work
 <!-- Alternative title: Filter-subscriber unlinkability -->
-- **Anonymous filter subscription**: This feature guarantees that nodes can anonymously subscribe for a message filter (i.e., without revealing their exact content filter).  As such, no adversary in the `WakuFilter` protocol would be able to link nodes to their subscribed content filers. The current version of the `WakuFilter` protocol does not provide anonymity as the subscribing node has a direct connection to the full node and explicitly submits its content filter to be notified about the matching messages. However, one can consider preserving anonymity through one of the following ways: 
-  - By hiding the source of the subscription i.e., anonymous communication. That is the subscribing node shall hide all its PII in its filter request e.g., its IP address. This can happen by the utilization of a proxy server or by using Tor<!-- TODO: if nodes have to disclose their PeerIDs (e.g., for authentication purposes) when connecting to other nodes in the WakuFilter protocol, then Tor does not preserve anonymity since it only helps in hiding the IP. So, the PeerId usage in switches must be investigated further. Depending on how PeerId is used, one may be able to link between a subscriber and its content filter despite hiding the IP address-->. 
+**Anonymous filter subscription**: This feature guarantees that nodes can anonymously subscribe for a message filter (i.e., without revealing their exact content filter). As such, no adversary in the `WakuFilter` protocol would be able to link nodes to their subscribed content filers. The current version of the `WakuFilter` protocol does not provide anonymity as the subscribing node has a direct connection to the full node and explicitly submits its content filter to be notified about the matching messages. However, one can consider preserving anonymity through one of the following ways: 
+- By hiding the source of the subscription i.e., anonymous communication. That is the subscribing node shall hide all its PII in its filter request e.g., its IP address. This can happen by the utilization of a proxy server or by using Tor<!-- TODO: if nodes have to disclose their PeerIDs (e.g., for authentication purposes) when connecting to other nodes in the WakuFilter protocol, then Tor does not preserve anonymity since it only helps in hiding the IP. So, the PeerId usage in switches must be investigated further. Depending on how PeerId is used, one may be able to link between a subscriber and its content filter despite hiding the IP address-->. 
   Note that the current structure of filter requests i.e., `FilterRPC` does not embody any piece of PII, otherwise, such data fields must be treated carefully to achieve anonymity. 
-  - By deploying secure 2-party computations in which the subscribing node obtains the messages matching a content filter whereas the full node learns nothing about the content filter as well as the messages pushed to the subscribing node. Examples of such 2PC protocols are [Oblivious Transfers](https://link.springer.com/referenceworkentry/10.1007%2F978-1-4419-5906-5_9#:~:text=Oblivious%20transfer%20(OT)%20is%20a,information%20the%20receiver%20actually%20obtains.) and one-way Private Set Intersections (PSI).
+- By deploying secure 2-party computations in which the subscribing node obtains the messages matching a content filter whereas the full node learns nothing about the content filter as well as the messages pushed to the subscribing node. Examples of such 2PC protocols are [Oblivious Transfers](https://link.springer.com/referenceworkentry/10.1007%2F978-1-4419-5906-5_9#:~:text=Oblivious%20transfer%20(OT)%20is%20a,information%20the%20receiver%20actually%20obtains.) and one-way Private Set Intersections (PSI).
 
 # Changelog