clarified the 'Networking with Trio' section of the tutorial

[Adrien-Luxey]

I misunderstood this section of the tutorial: I thought the "echo client" code provided both server and client.

So I made it clear in the tutorial that the first code sample (the client) does not work without a server listening on the other end.

[codecov]

Codecov Report

Merging #1737 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1737   +/-   ##
=======================================
  Coverage   99.63%   99.63%           
=======================================
  Files         114      114           
  Lines       14427    14427           
  Branches     1104     1104           
=======================================
  Hits        14375    14375           
  Misses         37       37           
  Partials       15       15           

[pquentin]

Looking at the result on https://trio--1737.org.readthedocs.build/en/1737/tutorial.html, I only have one suggestion, please tell us what you think.

[pquentin]

Thanks!

[trio-bot]

Hey @Adrien-Luxey, it looks like that was the first time we merged one of your PRs! Thanks so much! 🎉 🎂

If you want to keep contributing, we'd love to have you. So, I just sent you an invitation to join the python-trio organization on Github! If you accept, then here's what will happen:

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