Update src/lib.rs

Co-authored-by: Yacin Tmimi <yacintmimi@gmail.com>

Author: shulaoda

src/lib.rs

@@ -112,7 +112,11 @@ pub enum ErrorKind {
         "line formatted, but exceeded maximum width \
          (maximum: {1} (see `max_width` option), found: {0})"
     )]
-    LineOverflow(usize, usize, usize),
+LineOverflow {
+    total_line_width: usize,
+    max_width: usize,
+    overflow_start_byte: usize
+}
     /// Line ends in whitespace.
     #[error("left behind trailing whitespace")]
     TrailingWhitespace,