clarity

src/lib.rs

@@ -617,7 +617,7 @@ impl<'a> Decoder<'a> {
  }
 
  /// Returns the header record for the underlying CSV data. This method may
- /// be called at any time.
+ /// be called repeatedly and at any time.
  ///
  /// If `has_headers` is `false` (which is the default), then this will
  /// always return an empty vector.