fix: apply cargo fmt formatting fixes

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Co-Authored-By: Claude <noreply@anthropic.com>

Author: unhappychoice

src/game/display_ratatui.rs

@@ -175,7 +175,7 @@ impl GameDisplayRatatui {
                 let should_skip = skip_cache.get(&i).copied().unwrap_or(false);
                 let is_comment = comment_cache.get(&i).copied().unwrap_or(false);
                 let is_current_line = line_number == current_line_number;
-                
+
                 if !should_skip {
                     let style = self.get_char_style_with_highlight(
                         i,
@@ -185,11 +185,11 @@ impl GameDisplayRatatui {
                         current_mistake_position,
                         is_current_line,
                     );
-                    
+
                     // Show newline as enter symbol
                     current_line_spans.push(Span::styled("↵".to_string(), style));
                 }
-                
+
                 lines.push(Line::from(current_line_spans));
                 current_line_spans = Vec::new();
                 current_line_width = 0;