why plus a minus value and not just minus the value... (#31279)

* Update bullets.dm

* Update visuals_icons.dm

* Update asteroid.dm

code/modules/mob/living/simple_animal/friendly/drone/visuals_icons.dm

@@ -86,7 +86,7 @@
 		if(istype(head, /obj/item/clothing/mask))
 			used_head_icon = 'icons/mob/mask.dmi'
 		var/mutable_appearance/head_overlay = head.build_worn_icon(state = head.icon_state, default_layer = DRONE_HEAD_LAYER, default_icon_file = used_head_icon)
-		head_overlay.pixel_y += -15
+		head_overlay.pixel_y -= 15
 
 		drone_overlays[DRONE_HEAD_LAYER] = head_overlay
 

code/modules/projectiles/projectile/bullets.dm

@@ -10,7 +10,7 @@
 
 /obj/item/projectile/bullet/pellet/Range()
 	..()
-	damage += -0.75
+	damage -= 0.75
 	if(damage < 0)
 		qdel(src)