read: error in example

src/lib.rs

@@ -141,7 +141,7 @@ pub fn get_errno() -> c_int {
 ///
 ///     let mut remaining = read;
 ///     while remaining > 0 {
-///         let written = match write(STDOUT, &buffer[BUFSIZ - remaining..], remaining) {
+///         let written = match write(STDOUT, &buffer[read - remaining..], remaining) {
 ///              n if n < 0 => panic!("read: {}", strerror(get_errno())),
 ///              n => n as size_t,
 ///         };