Format fill.rs, which the last release left past the width limit

core/dr-pano/src/fill.rs

@@ -745,7 +745,15 @@ mod tests {
             tile: 64,
             seen: Vec::new(),
         };
-        let tiles = fill_border(&mut rgb, 300, 40, &known, &mut model, test_params(0), &mut |_, _| {})
+        let tiles = fill_border(
+            &mut rgb,
+            300,
+            40,
+            &known,
+            &mut model,
+            test_params(0),
+            &mut |_, _| {},
+        )
         .unwrap();
         assert!(tiles > 0, "no tile fitted a picture shorter than the tile");
         for i in 0..300 * 40 {