small fix

src/error.rs

@@ -85,15 +85,13 @@ impl fmt::Display for Error {
             error += ": ";
             error += desc;
         }
-        write!(f, "{}", error);
-        Ok(())
+        write!(f, "{}", error)
     }
 }
 
 impl fmt::Debug for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        self.fmt(f);
-        Ok(())
+        self.fmt(f)
     }
 }