Trivial update src/handshake/machine.rs

Comment rewording.

Co-authored-by: Daniel Abramov <inetcrack2@gmail.com>

src/handshake/machine.rs

@@ -149,8 +149,8 @@ impl AttackCheck {
         AttackCheck { number_of_packets: 0, number_of_bytes: 0 }
     }
 
-    /// Check size of incoming packet. To be called immediately after `read()`
-    /// passing its return bytes count as `size`.
+    /// Check the size of an incoming packet. To be called immediately after `read()`
+    /// passing its returned bytes count as `size`.
     fn check_incoming_packet_size(&mut self, size: usize) -> Result<()> {
         self.number_of_packets += 1;
         self.number_of_bytes += size;