Improved naming of Header constructor

`from_record` is now called `with_record` as the library standard
suggests

src/main.rs

@@ -1,6 +1,8 @@
 use std::{env::{self}, io::Error, path::Path};
 use std::fs;
 
+use crate::headparse::Header;
+
 pub mod headparse; // The HEAder parsing 
 
 /// Use for handling possible formats of the WFDB data
@@ -28,14 +30,17 @@ fn main() -> Result<(), Error>{
         println!("File provided is not a .hea file");
         return Ok(());
     }
-
+    
+    {
     let hea_file_result = fs::read_to_string(filepath);
-    match hea_file_result {
-        Ok(file_data) => {
-            let header = headparse::parse_header(file_data.as_str());
-            dbg!(header);
+        match hea_file_result {
+            Ok(file_data) => {
+                let header = headparse::parse_header(file_data.as_str());
+
+                dbg!(header);
+            }
+            Err(e) => return Err(e)
         }
-        Err(e) => return Err(e)
     }
     println!("Hello, world!");
     Ok(())
@@ -44,4 +49,4 @@ fn main() -> Result<(), Error>{
 fn help() {
     println!("Conversion of WFDB files to a more human readable format. By default to a CSV.");
     println!("\nUse in the format \"wfdb_corrosion (.hea filename)\"")
-}
+}