more: file status made more idiomatic. (#10151)

as checking for presence and unwrapping looks inefficient.

src/uu/more/src/more.rs

@@ -837,8 +837,11 @@ impl<'a> Pager<'a> {
         // Determine progress information to display
         // - Show next file name when at EOF and there is a next file
         // - Otherwise show percentage of the file read (if available)
-        let progress_info = if self.eof_reached && self.next_file.is_some() {
-            format!(" (Next file: {})", self.next_file.unwrap())
+        let progress_info = if self.eof_reached {
+            self.next_file
+                .as_ref()
+                .map(|next_file| format!(" (Next file: {next_file})"))
+                .unwrap_or_default()
         } else if let Some(file_size) = self.file_size {
             // For files, show percentage or END
             let position = self