Edit TLSSocket.md

Make minor edits, mostly for active voice and consistent tone across docs.

Author: Amanda Butler

docs/api/networksocket/TLSSocket.md

@@ -1,19 +1,19 @@
 ## TLSSocket
 
-`TLSSocket` and `TLSSocketWrapper` are implementing TLS stream over existing `Socket` transport. Design and implementation details are explained in [Secure Socket](../reference/securesocket.html) page.
+`TLSSocket` and `TLSSocketWrapper` implement TLS stream over the existing `Socket` transport. You can find design and implementation details in the [SecureSocket](../reference/securesocket.html) page.
 
-For using secure TLS connections, application utilise the `TLSSocketWrapper` through Socket API, so existing applications and libraries should be compatible.
+To use secure TLS connections, the application uses the `TLSSocketWrapper` through the Socket API, so existing applications and libraries are compatible.
 
 ### TLSSocket class reference
 
 [![View code](https://www.mbed.com/embed/?type=library)](http://os-doc-builder.test.mbed.com/docs/development/mbed-os-api-doxy/class_t_l_s_socket.html)
 
-### TLSSocket Example
+### TLSSocket example
 
-TLSSocket example creates TLS connection to HTTPS server and receives a simple response from the server.
+The TLSSocket example creates TLS connection to the HTTPS server and receives a simple response from the server:
 
 [![View code](https://www.mbed.com/embed/?url=https://github.com/ARMmbed/mbed-os-examples-docs_only/tree/master/TLSSocket)](https://github.com/ARMmbed/mbed-os-examples-docs_only/tree/master/TLSSocket/main.cpp)
 
 ### Related content
 
-- [Secure Socket](../reference/securesocket.html)
+- [SecureSocket](../reference/securesocket.html).