Remove extra white space (#7477)

docs/introduction/architecture.md

@@ -61,7 +61,7 @@ Here are some relevant facts about TCP:
 
 ![tcp](../imgs/tcp-window.png)
 
-In order to have performant TCP connections under the conditions  created in Tendermint, we've created the `mconnection`, or the multiplexing connection. It is our own protocol built on top of TCP. It lets us reuse TCP connections to minimize overhead, and it keeps the window size high by sending auxiliary messages when necessary.
+In order to have performant TCP connections under the conditions created in Tendermint, we've created the `mconnection`, or the multiplexing connection. It is our own protocol built on top of TCP. It lets us reuse TCP connections to minimize overhead, and it keeps the window size high by sending auxiliary messages when necessary.
 
 The `mconnection` is represented by a struct, which contains a batch of messages, read and write buffers, and a map of channel IDs to reactors. It communicates with TCP via file descriptors, which it can write to. There is one `mconnection` per peer connection.