fix: Fix nit

Author: chengr4

src/renderer/display_list.rs

@@ -147,7 +147,7 @@ impl<'a> DisplayList<'a> {
 fn get_max_lineno(body: &[DisplaySet<'_>]) -> Option<usize> {
     let max_lineno = body.iter().fold(None, |max, set| {
         set.display_lines.iter().fold(max, |max, line| match line {
-            DisplayLine::Source { lineno, .. } => std::cmp::max(max, *lineno),
+            DisplayLine::Source { lineno, .. } => cmp::max(max, *lineno),
             _ => max,
         })
     });