More useful `Debug` impls

1 files changed, 6 insertions, 1 deletions

diff --git a/src/layout/tree.rs b/src/layout/tree.rs
index 36d0ac25..3b7c4937 100644
--- a/src/layout/tree.rs
+++ b/src/layout/tree.rs
@@ -10,7 +10,6 @@ use {
 };
 
 /// A tree of layout nodes.
-#[derive(Debug)]
 pub struct LayoutTree {
     /// Runs of pages with the same properties.
     pub runs: Vec<PageRun>,
@@ -23,6 +22,12 @@ impl LayoutTree {
     }
 }
 
+impl Debug for LayoutTree {
+    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        f.debug_list().entries(&self.runs).finish()
+    }
+}
+
 /// A run of pages that all have the same properties.
 #[derive(Debug)]
 pub struct PageRun {