Cleanup documentation

[Nashtare]

This PR cleans-up code snippets, following @atanmarko's suggestion.

[codecov[bot]]

Codecov Report

Base: 87.25% // Head: 87.25% // No change to project coverage :thumbsup:

Coverage data is based on head (89c2cf1) compared to base (4a9987c). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #49 +/- ## ======================================= Coverage 87.25% 87.25% ======================================= Files 5 5 Lines 1248 1248 ======================================= Hits 1089 1089 Misses 159 159 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=toposware). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=toposware)

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[atanmarko]

You could also remove comment // from: Lines 80-85

//! // send_to_bob(alice);
//! // send_to_carol(alice);
//! // send_to_alice(bob);
//! // send_to_carol(bob);
//! // send_to_alice(carol);
//! // send_to_bob(carol);

Lines 215-216

//! // send_to_bob(alice_their_encrypted_secret_shares[0]);
//! // send_to_carol(alice_their_encrypted_secret_shares[1]);