diff -r e519802076e9 -r 8e74d4eb89f5 rust/hwphysics/src/grid.rs
--- a/rust/hwphysics/src/grid.rs	Fri Mar 22 23:46:48 2019 +0300
+++ b/rust/hwphysics/src/grid.rs	Sat Mar 23 01:07:23 2019 +0300
@@ -1,23 +1,15 @@
 use crate::{
+    collision::{fppoint_round, CircleBounds, DetectedCollisions},
     common::GearId,
-    collision::{
-        fppoint_round,
-        CircleBounds,
-        DetectedCollisions
-    }
 };
 
-use integral_geometry::{
-    Point,
-    Size,
-    GridIndex
-};
 use fpnum::FPPoint;
+use integral_geometry::{GridIndex, Point, Size};
 
 struct GridBin {
     refs: Vec<GearId>,
     static_entries: Vec<CircleBounds>,
-    dynamic_entries: Vec<CircleBounds>
+    dynamic_entries: Vec<CircleBounds>,
 }
 
 impl GridBin {
@@ -25,7 +17,7 @@
         Self {
             refs: vec![],
             static_entries: vec![],
-            dynamic_entries: vec![]
+            dynamic_entries: vec![],
         }
     }
 }
@@ -36,21 +28,19 @@
     bins: Vec<GridBin>,
     space_size: Size,
     bins_count: Size,
-    index: GridIndex
+    index: GridIndex,
 }
 
 impl Grid {
     pub fn new(size: Size) -> Self {
         assert!(size.is_power_of_two());
-        let bins_count =
-            Size::new(size.width / GRID_BIN_SIZE,
-                      size.height / GRID_BIN_SIZE);
+        let bins_count = Size::new(size.width / GRID_BIN_SIZE, size.height / GRID_BIN_SIZE);
 
         Self {
             bins: (0..bins_count.area()).map(|_| GridBin::new()).collect(),
             space_size: size,
             bins_count,
-            index: Size::square(GRID_BIN_SIZE).to_grid_index()
+            index: Size::square(GRID_BIN_SIZE).to_grid_index(),
         }
     }
 
@@ -68,7 +58,9 @@
     }
 
     pub fn insert_dynamic(&mut self, gear_id: GearId, bounds: &CircleBounds) {
-        self.lookup_bin(&bounds.center).dynamic_entries.push(*bounds)
+        self.lookup_bin(&bounds.center)
+            .dynamic_entries
+            .push(*bounds)
     }
 
     pub fn check_collisions(&self, collisions: &mut DetectedCollisions) {
@@ -88,4 +80,4 @@
             }
         }
     }
-}
\ No newline at end of file
+}