Updated the README.md and the tests

README.md

@@ -9,7 +9,7 @@
 <br>
 [![CI Badge](https://git.nicolabelluti.me/nicolabelluti/r701/actions/workflows/check-format-and-test.yaml/badge.svg)](https://git.nicolabelluti.me/nicolabelluti/r701/actions/?workflow=check-format-and-test.yaml)
 
-</div>
+</div><br>
 
 > A reverse-engineered library to communicate with the
 > [R701](https://ipsattendant.it/rilevatore-presenze-r701/) by [I.P.S.
@@ -18,6 +18,8 @@
 If you want to read about this reverse engineering attempt, check out
 <https://nicolabelluti.me/series/attendance-reader/>.
 
+## Library Usage
+
 1. Add the library to you project:
 
    ```shell

src/record.rs

@@ -106,7 +106,7 @@ mod tests {
 
         assert_eq!(
             record_bytes.try_into(),
-            Err::<Record, &str>("Slice must be at least of length 12 to be converted into Record")
+            Err::<Record, &str>("Slice must be of length 12 to be converted into Record")
         );
     }