Change MuJoCo engine source code function-spacing convention from 3 blank lines to 2

PiperOrigin-RevId: 813754244
Change-Id: I6836e41c3b021cb727e922c25c60f629b9814c93

src/engine/engine_collision_box.c

@@ -91,7 +91,6 @@ int mjraw_SphereBox(mjContact* con, mjtNum margin,
 }
 
 
-
 // sphere : box
 int mjc_SphereBox(const mjModel* m, const mjData* d, mjContact* con,
                   int g1, int g2, mjtNum margin)
@@ -102,7 +101,6 @@ int mjc_SphereBox(const mjModel* m, const mjData* d, mjContact* con,
 }
 
 
-
 /* GENERAL THEORY OF OPERATION
    the following code is mostly for finding (line segment)/(box) collision
    after which box-sphere is called
@@ -601,7 +599,6 @@ int mjc_CapsuleBox(const mjModel* m, const mjData* d, mjContact* con,
 }
 
 
-
 // box : box
 int mjc_BoxBox(const mjModel* M, const mjData* D, mjContact* con, int g1, int g2, mjtNum margin)
 {