message: Fix Readme example formatting
diff: @@ -39,7 +39,7 @@ as well!
  Basic connections, and those with options. The compiler will force these to be correct.
  ```rust
  -# fn main() -> std::io::Result<()> {
  +fn main() -> std::io::Result<()> {
  let nc = nats::connect("demo.nats.io")?;
  let nc2 = nats::Options::with_user_pass("derek", "s3cr3t!")
  @@ -52,8 +52,8 @@ let nc3 = nats::Options::with_credentials("path/to/my.creds")
  let nc4 = nats::Options::new()
  .add_root_certificate("my-certs.pem")
  .connect("tls://demo.nats.io:4443")?;
  -# Ok(())
  -# }
  +Ok(())
  +}
  ```
  <!--
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