Fix drops for shearing mushroom cow (#11632)

patches/server/Add-drops-to-shear-events.patch

@@ -113,13 +113,12 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -                    }
 -                    worldserver1.addFreshEntity(entityitem);
 -                    // CraftBukkit end
-+            // Paper start - custom shear drops; moved drop generation to separate method
-+            drops.forEach(itemstack1 -> {
-+                for (final ItemStack drop : drops) {
-+                    ItemEntity entityitem = new ItemEntity(this.level(), this.getX(), this.getY(1.0D), this.getZ(), drop);
-+                    this.spawnAtLocation(world, entityitem);
-                 }
+-                }
 -
++            // Paper start - custom shear drops; moved drop generation to separate method
++            drops.forEach(drop -> {
++                ItemEntity entityitem = new ItemEntity(this.level(), this.getX(), this.getY(1.0D), this.getZ(), drop);
++                this.spawnAtLocation(world, entityitem);
 +            // Paper end - custom shear drops; moved drop generation to separate method
              });
          }, EntityTransformEvent.TransformReason.SHEARED, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.SHEARED); // CraftBukkit
@@ -177,8 +176,11 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        drops.forEach(itemstack1 -> { // Paper - custom drops - loop in generated default drops
 +            if (true) { // Paper - custom drops - loop in generated default drops
                  this.forceDrops = true; // CraftBukkit
-                 ItemEntity entityitem = this.spawnAtLocation(worldserver1, itemstack1.copyWithCount(1), 1.0F);
+-                ItemEntity entityitem = this.spawnAtLocation(worldserver1, itemstack1.copyWithCount(1), 1.0F);
++                ItemEntity entityitem = this.spawnAtLocation(worldserver1, itemstack1, 1.0F); // Paper - custom drops - copy already done above
                  this.forceDrops = false; // CraftBukkit
+ 
+                 if (entityitem != null) {
 diff --git a/src/main/java/net/minecraft/world/entity/animal/SnowGolem.java b/src/main/java/net/minecraft/world/entity/animal/SnowGolem.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/net/minecraft/world/entity/animal/SnowGolem.java