finished while form

Signed-off-by: Ava Hahn <ava@aidanis.online>

src/config.rs

@@ -61,7 +61,7 @@ pub fn configure(filename: String, syms: &mut SymTable) -> Result<(), String> {
 
     let mut config_document = fs::read_to_string(filename)
         .unwrap_or_else(|err: io::Error| {
-            eprintln!("{}", err.to_string());
+            eprintln!("{}", err);
             "".to_string()
         }) + ")";