Tx/ Rx annotations

[AIBappa]

This is not really an issue but could not see anyplace to request a feature as below. So added it here.

So for the the ask function and write function using IDN as an example, would the output be able to show.
Tx> *IDN
Rx< device ID

Currently the command requested is not shown on the output, so if there was a complementary write or ask function that printed what command was sent that would be useful in a log.
Also the TX> and RX < with the <> brackets can be useful to show what was transmitted and what was received.

Obviously this functionality can be achieved, by printing the command and then sending it via ask or write, but if we can have a new combined function it will make a testers role much efficient in just writing single line instead of 2.