Fix typos.

src/main.rs

@@ -7,7 +7,7 @@ use chrono::Local;
 
 /// Command-line arguments using Clap.
 #[derive(Parser, Debug)]
-#[command(author, version, about = "A tool for echoing latitude and longitude from a GPS USB dongle..")]
+#[command(author, version, about = "A tool for echoing latitude and longitude from a GPS USB dongle.")]
 struct Cli {
     
     /// COM port
@@ -19,13 +19,12 @@ fn main() {
 
     let cli = Cli::parse();
 
-
-
     let com = match cli.com {
                             Some(com) => com,
                             None =>  {
+                                    // https://github.com/serialport/serialport-rs#listing-available-ports
                                     let ports = serialport::available_ports().expect("No ports found!");
-                                        println!("Avaiable Ports:");
+                                        println!("Available Ports:");
                                         for p in ports {
                                             println!("{}", p.port_name);
                                         }