Convert some bools to TRUE/FALSE instead of 1/0. (#11100)

Co-authored-by: Aronai Sieyes <arokha@arokha.com>

code/modules/mining/mine_items.dm

@@ -26,7 +26,7 @@
 	attack_verb = list("hit", "pierced", "sliced", "attacked")
 	var/drill_sound = "pickaxe"
 	var/drill_verb = "drilling"
-	sharp = 1
+	sharp = TRUE
 
 	var/excavation_amount = 200
 	var/destroy_artefacts = FALSE // some mining tools will destroy artefacts completely while avoiding side-effects.
@@ -78,8 +78,8 @@
 	desc = "A rock cutter that uses bursts of hot plasma. You could use it to cut limbs off of xenos! Or, you know, mine stuff."
 	drill_verb = "cutting"
 	drill_sound = 'sound/items/Welder.ogg'
-	sharp = 1
-	edge = 1
+	sharp = TRUE
+	edge = TRUE
 
 /obj/item/weapon/pickaxe/diamond
 	name = "diamond pickaxe"
@@ -124,8 +124,8 @@
 	origin_tech = list(TECH_MATERIAL = 1, TECH_ENGINEERING = 1)
 	matter = list(MAT_STEEL = 50)
 	attack_verb = list("bashed", "bludgeoned", "thrashed", "whacked")
-	sharp = 0
-	edge = 1
+	sharp = FALSE
+	edge = TRUE
 	var/digspeed = 40
 
 /obj/item/weapon/shovel/spade
@@ -144,7 +144,7 @@
 	desc = "A mining car. This one doesn't work on rails, but has to be dragged."
 	name = "Mining car (not for rails)"
 	icon = 'icons/obj/closets/miningcar.dmi'
-	density = 1
+	density = TRUE
 
 // Flags.
 
@@ -193,7 +193,7 @@
 	if(upright)
 		upright = 0
 		icon_state = base_state
-		anchored = 0
+		anchored = FALSE
 		src.visible_message("<b>[user]</b> knocks down [src].")
 	else
 		..()