Change module doc a bit

src/api_client.rs

@@ -1,4 +1,4 @@
-//! This modules holds the elements pertaining to ApiClient, a REST API client.
+//! Holds the elements pertaining to ApiClient, a REST API client.
 
 use std::fs::read_to_string;
 use std::io;

src/ear.rs

@@ -1,4 +1,4 @@
-//! This modules holds the elements pertaining to Ear, a listener object.
+//! Holds the elements pertaining to Ear, a listener object.
 
 use std::io::{prelude::*, BufReader};
 use std::net::{TcpListener, TcpStream};

src/mouth.rs

@@ -1,4 +1,4 @@
-//! This modules holds the elements pertaining to Mouth, a sender object.
+//! Holds the elements pertaining to Mouth, a sender object.
 
 use std::{io::Write, net::TcpStream};