Lints for Empty Variable-Edit "List" in the TGM Syntax + Fixes Occurrence in Codebase (#73831)

## About The Pull Request

Caused by #73758 due to improper search-and-delete (presumably) without
running mapmerge or something to catch it, very sad. Let's add a linter
to make sure this doesn't occur again.

More information on what exactly was broken may be found here:
https://github.com/tgstation/tgstation/pull/73758#issuecomment-1457508565
## Why It's Good For The Game


![image](https://user-images.githubusercontent.com/34697715/223326428-7f02ea8d-a881-4fa8-b87d-717b39e1fff2.png)

makes me sad to see it, it's ugly, and mapmerge will fix it away anyways
over the next few months since it's an invalid/bugged case. let's just
prevent it from happening again. (hopefully this hasn't been impacting
the map loader at all? i don't see why it would but I know this case
isn't exactly accounted for). i noticed that we're able to flatten a lot
more keys now as well since we don't have literally nothing preventing
that flattening, which is a plus.
## Changelog
Nothing that concerns players.

_maps/RandomRuins/LavaRuins/lavaland_surface_syndicate_base1.dmm

@@ -4184,8 +4184,7 @@
 	dir = 8
 	},
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer2,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/ruin/syndicate_lava_base/dormitories)
 "RK" = (
 /turf/open/floor/iron,
@@ -4397,8 +4396,7 @@
 	},
 /obj/structure/cable,
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer2,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/ruin/syndicate_lava_base/dormitories)
 "Vp" = (
 /obj/effect/decal/cleanable/dirt,

_maps/map_files/Deltastation/DeltaStation2.dmm

@@ -209,8 +209,7 @@
 /obj/structure/disposalpipe/segment{
 	dir = 10
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/locker)
 "act" = (
 /obj/machinery/atmospherics/pipe/smart/simple/yellow/visible{
@@ -2043,14 +2042,6 @@
 /obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
 /turf/open/floor/iron,
 /area/station/hallway/primary/central/aft)
-"avT" = (
-/obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
-/obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
-/obj/structure/cable,
-/obj/effect/turf_decal/tile/neutral/half/contrasted,
-/turf/open/floor/iron{
-	},
-/area/station/commons/locker)
 "avX" = (
 /obj/machinery/atmospherics/pipe/bridge_pipe/green/visible{
 	dir = 4
@@ -2557,8 +2548,7 @@
 /obj/structure/disposalpipe/segment{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/hallway/primary/central/aft)
 "aCS" = (
 /obj/machinery/door/airlock/external{
@@ -2976,8 +2966,7 @@
 /obj/effect/turf_decal/tile/neutral/half/contrasted{
 	dir = 1
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/command/heads_quarters/ce)
 "aHF" = (
 /obj/effect/turf_decal/tile/neutral/half/contrasted,
@@ -3574,8 +3563,7 @@
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
 /obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
 /obj/effect/turf_decal/tile/neutral/half/contrasted,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/toilet/locker)
 "aPl" = (
 /obj/effect/turf_decal/tile/neutral{
@@ -3900,8 +3888,7 @@
 /obj/effect/turf_decal/tile/neutral/half/contrasted{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "aUo" = (
 /obj/effect/turf_decal/tile/neutral/full,
@@ -5450,8 +5437,7 @@
 "bmq" = (
 /obj/structure/filingcabinet/chestdrawer,
 /obj/effect/turf_decal/tile/neutral/half/contrasted,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/security/courtroom)
 "bmt" = (
 /obj/structure/table,
@@ -5890,14 +5876,6 @@
 /obj/structure/disposalpipe/segment,
 /turf/open/floor/iron,
 /area/station/security/office)
-"brY" = (
-/obj/effect/decal/cleanable/dirt,
-/obj/effect/turf_decal/tile/neutral/half/contrasted{
-	dir = 8
-	},
-/turf/open/floor/iron{
-	},
-/area/station/maintenance/port/aft)
 "brZ" = (
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
 /obj/effect/decal/cleanable/dirt,
@@ -6176,8 +6154,7 @@
 /obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
 /obj/structure/cable,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/department/science)
 "bvj" = (
 /obj/effect/decal/cleanable/dirt,
@@ -6965,8 +6942,7 @@
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
 /obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
 /obj/effect/turf_decal/tile/neutral/half/contrasted,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/toilet/locker)
 "bEN" = (
 /obj/structure/cable,
@@ -6999,8 +6975,7 @@
 /obj/structure/disposalpipe/segment{
 	dir = 9
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/locker)
 "bFb" = (
 /obj/machinery/atmospherics/components/unary/vent_scrubber/on/layer2{
@@ -7602,8 +7577,7 @@
 	dir = 8
 	},
 /obj/structure/cable,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "bLo" = (
 /obj/structure/disposalpipe/segment,
@@ -9294,13 +9268,6 @@
 	},
 /turf/open/floor/iron/checker,
 /area/station/service/bar/backroom)
-"cfs" = (
-/obj/effect/turf_decal/tile/neutral/half/contrasted{
-	dir = 1
-	},
-/turf/open/floor/iron{
-	},
-/area/station/commons/locker)
 "cfu" = (
 /turf/open/floor/circuit/green,
 /area/station/ai_monitored/turret_protected/ai_upload)
@@ -11105,8 +11072,7 @@
 "cBN" = (
 /obj/item/kirbyplants/random,
 /obj/effect/turf_decal/tile/neutral/half/contrasted,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/security/courtroom)
 "cBT" = (
 /obj/machinery/atmospherics/components/unary/vent_pump/on/layer4{
@@ -12847,8 +12813,7 @@
 	dir = 8
 	},
 /obj/effect/spawner/random/structure/girder,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "cYD" = (
 /obj/structure/closet/secure_closet/security/sec,
@@ -13948,8 +13913,7 @@
 /obj/effect/turf_decal/tile/neutral/half/contrasted{
 	dir = 1
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "dnW" = (
 /obj/machinery/atmospherics/pipe/smart/simple/scrubbers/visible{
@@ -17379,8 +17343,7 @@
 /obj/effect/turf_decal/tile/neutral/half/contrasted{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/command/heads_quarters/ce)
 "egU" = (
 /obj/machinery/conveyor{
@@ -18262,8 +18225,7 @@
 /obj/effect/turf_decal/tile/neutral/half/contrasted{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/command/heads_quarters/ce)
 "erZ" = (
 /obj/structure/chair/office{
@@ -18719,8 +18681,7 @@
 /obj/structure/disposalpipe/segment{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/locker)
 "exf" = (
 /obj/effect/decal/cleanable/blood/old,
@@ -19370,8 +19331,7 @@
 	},
 /obj/structure/disposalpipe/segment,
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/locker)
 "eHi" = (
 /obj/effect/turf_decal/tile/neutral/fourcorners,
@@ -20773,8 +20733,7 @@
 /obj/effect/turf_decal/tile/neutral/half/contrasted{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "eXN" = (
 /obj/machinery/vending/wardrobe/engi_wardrobe,
@@ -25049,8 +25008,7 @@
 	},
 /obj/machinery/duct,
 /obj/structure/cable,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/department/science)
 "fZO" = (
 /turf/open/floor/engine/vacuum,
@@ -30905,8 +30863,7 @@
 	dir = 4
 	},
 /obj/machinery/light/directional/north,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/locker)
 "hwC" = (
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
@@ -31121,8 +31078,7 @@
 /obj/structure/disposalpipe/junction{
 	dir = 1
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/locker)
 "hzJ" = (
 /obj/machinery/ai_slipper{
@@ -37200,8 +37156,7 @@
 	},
 /obj/structure/extinguisher_cabinet/directional/north,
 /obj/item/radio/intercom/directional/west,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/locker)
 "jbG" = (
 /obj/structure/rack,
@@ -37957,8 +37912,7 @@
 /area/station/medical/paramedic)
 "jjU" = (
 /obj/effect/turf_decal/tile/neutral/half/contrasted,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "jjX" = (
 /obj/item/storage/medkit/fire,
@@ -38267,8 +38221,7 @@
 /obj/structure/cable,
 /obj/machinery/power/apc/auto_name/directional/east,
 /obj/effect/turf_decal/tile/neutral/anticorner/contrasted,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/security/courtroom)
 "jnd" = (
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
@@ -39862,8 +39815,7 @@
 /obj/machinery/atmospherics/components/unary/vent_pump/on/layer4{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "jFz" = (
 /obj/machinery/light/small/directional/east,
@@ -46113,8 +46065,7 @@
 	dir = 4
 	},
 /obj/structure/cable,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/hallway/primary/central/aft)
 "lgg" = (
 /obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
@@ -48196,8 +48147,7 @@
 /obj/effect/turf_decal/tile/neutral/anticorner/contrasted{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "lGU" = (
 /obj/effect/decal/cleanable/dirt,
@@ -50145,8 +50095,7 @@
 /obj/structure/disposalpipe/segment{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/locker)
 "mgY" = (
 /turf/open/floor/glass/reinforced,
@@ -53494,8 +53443,7 @@
 /obj/machinery/duct,
 /obj/effect/decal/cleanable/dirt,
 /obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/toilet/locker)
 "mWF" = (
 /obj/structure/cable,
@@ -56173,8 +56121,7 @@
 	},
 /obj/structure/closet,
 /obj/effect/spawner/random/maintenance/two,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/department/science)
 "nGS" = (
 /obj/structure/cable,
@@ -56712,8 +56659,7 @@
 /obj/effect/turf_decal/tile/neutral/half/contrasted{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/fore)
 "nMT" = (
 /obj/effect/decal/cleanable/dirt,
@@ -57738,8 +57684,7 @@
 /obj/effect/turf_decal/tile/neutral/anticorner/contrasted{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/locker)
 "oaE" = (
 /obj/structure/cable,
@@ -59722,13 +59667,6 @@
 /obj/effect/turf_decal/stripes/line,
 /turf/open/floor/plating,
 /area/station/maintenance/solars/starboard/aft)
-"oBO" = (
-/obj/effect/turf_decal/tile/neutral/half/contrasted{
-	dir = 8
-	},
-/turf/open/floor/iron{
-	},
-/area/station/maintenance/port/aft)
 "oBX" = (
 /obj/machinery/atmospherics/pipe/smart/simple/scrubbers/visible,
 /obj/effect/turf_decal/tile/neutral{
@@ -64175,8 +64113,7 @@
 	},
 /obj/machinery/door/firedoor,
 /obj/machinery/duct,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/locker)
 "pIj" = (
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
@@ -69490,8 +69427,7 @@
 /obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
 /obj/machinery/light/small/directional/south,
 /obj/effect/turf_decal/tile/neutral/half/contrasted,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/toilet/locker)
 "qVJ" = (
 /obj/machinery/disposal/bin,
@@ -70675,8 +70611,7 @@
 	dir = 1
 	},
 /obj/effect/decal/cleanable/cobweb,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "rlL" = (
 /obj/effect/turf_decal/tile/blue,
@@ -71110,8 +71045,7 @@
 "rrF" = (
 /obj/structure/cable,
 /obj/effect/turf_decal/tile/neutral/half/contrasted,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/security/courtroom)
 "rrL" = (
 /obj/machinery/power/port_gen/pacman/pre_loaded,
@@ -75815,8 +75749,7 @@
 /obj/structure/disposalpipe/segment{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/hallway/primary/central/aft)
 "sAh" = (
 /obj/effect/spawner/structure/window,
@@ -76057,8 +75990,7 @@
 /obj/effect/turf_decal/tile/neutral/half/contrasted{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/locker)
 "sDk" = (
 /obj/structure/disposalpipe/segment,
@@ -78145,8 +78077,7 @@
 /obj/structure/disposalpipe/segment{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/locker)
 "tcc" = (
 /obj/structure/cable,
@@ -84298,8 +84229,7 @@
 	dir = 1
 	},
 /obj/effect/spawner/random/structure/steam_vent,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "uBA" = (
 /obj/effect/turf_decal/tile/neutral/fourcorners,
@@ -85942,13 +85872,6 @@
 /obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
 /turf/open/floor/plating,
 /area/station/maintenance/department/science)
-"uXs" = (
-/obj/effect/turf_decal/tile/neutral/half/contrasted{
-	dir = 8
-	},
-/turf/open/floor/iron{
-	},
-/area/station/commons/locker)
 "uXy" = (
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
 /obj/structure/cable,
@@ -86179,13 +86102,6 @@
 /obj/machinery/vending/wallmed/directional/west,
 /turf/open/floor/iron,
 /area/station/command/gateway)
-"uZS" = (
-/obj/effect/turf_decal/tile/neutral/half/contrasted{
-	dir = 1
-	},
-/turf/open/floor/iron{
-	},
-/area/station/maintenance/port/aft)
 "uZV" = (
 /obj/effect/turf_decal/plaque{
 	icon_state = "L6"
@@ -87010,8 +86926,7 @@
 /obj/effect/turf_decal/tile/neutral/anticorner/contrasted{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "vkG" = (
 /obj/effect/turf_decal/tile/yellow{
@@ -87060,8 +86975,7 @@
 /obj/effect/turf_decal/tile/neutral/fourcorners,
 /obj/effect/landmark/event_spawn,
 /obj/effect/landmark/xeno_spawn,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "vkN" = (
 /obj/structure/cable,
@@ -93645,8 +93559,7 @@
 	},
 /obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/commons/toilet/locker)
 "wMx" = (
 /obj/structure/chair/sofa/bench{
@@ -94856,8 +94769,7 @@
 /obj/effect/turf_decal/tile/neutral/half/contrasted{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/command/heads_quarters/ce)
 "xex" = (
 /obj/machinery/atmospherics/pipe/smart/manifold4w/scrubbers/hidden/layer2,
@@ -95246,8 +95158,7 @@
 /obj/effect/turf_decal/tile/neutral/anticorner/contrasted{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/fore)
 "xjd" = (
 /obj/structure/cable,
@@ -95290,8 +95201,7 @@
 /obj/effect/turf_decal/bot,
 /obj/machinery/power/apc/auto_name/directional/north,
 /obj/structure/cable,
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "xjR" = (
 /obj/structure/disposalpipe/segment,
@@ -96365,8 +96275,7 @@
 /obj/structure/disposalpipe/segment{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/command/heads_quarters/ce)
 "xyb" = (
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden/layer4,
@@ -99147,8 +99056,7 @@
 /obj/effect/turf_decal/tile/neutral/half/contrasted{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/station/maintenance/port/aft)
 "yho" = (
 /obj/structure/table/wood,
@@ -128748,7 +128656,7 @@ xoR
 lou
 syJ
 kzc
-brY
+tlV
 dBs
 bvP
 ihO
@@ -131319,8 +131227,8 @@ heP
 amy
 aKp
 qSJ
-oBO
-brY
+iKd
+tlV
 tTg
 sGI
 afK
@@ -132612,7 +132520,7 @@ pUi
 bsN
 joB
 qQM
-uZS
+qBk
 jFp
 vkM
 jjU
@@ -147205,7 +147113,7 @@ gwT
 rYA
 jbC
 ewZ
-uXs
+fse
 tcb
 oaB
 cXv
@@ -147718,9 +147626,9 @@ rYA
 rYA
 rYA
 hwB
-avT
+oOx
 nVB
-cfs
+xCF
 mgX
 kbQ
 oCP

_maps/map_files/generic/CentCom.dmm

@@ -205,8 +205,7 @@
 /obj/effect/turf_decal/tile/neutral{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/centcom/tdome/observation)
 "bi" = (
 /turf/open/floor/iron/white,
@@ -656,8 +655,7 @@
 /obj/effect/turf_decal/tile/neutral{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/centcom/tdome/observation)
 "el" = (
 /obj/structure/filingcabinet/medical,
@@ -4139,8 +4137,7 @@
 /obj/effect/turf_decal/tile/neutral{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/centcom/central_command_areas/control)
 "tN" = (
 /obj/effect/turf_decal/tile/green{
@@ -4936,8 +4933,7 @@
 /obj/effect/turf_decal/tile/neutral{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/centcom/central_command_areas/control)
 "xo" = (
 /obj/effect/turf_decal/tile/green,
@@ -6143,8 +6139,7 @@
 /obj/effect/turf_decal/tile/neutral{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/centcom/tdome/observation)
 "DF" = (
 /obj/structure/sign/warning/no_smoking,
@@ -7408,8 +7403,7 @@
 /obj/effect/turf_decal/tile/neutral{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/centcom/tdome/observation)
 "Nn" = (
 /obj/structure/table/reinforced,
@@ -8204,8 +8198,7 @@
 /obj/effect/turf_decal/tile/neutral{
 	dir = 4
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/centcom/tdome/observation)
 "Rj" = (
 /obj/machinery/atmospherics/pipe/smart/manifold4w/supply/hidden{

_maps/shuttles/arrival_delta.dmm

@@ -157,8 +157,7 @@
 /obj/effect/turf_decal/tile/neutral{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/shuttle/arrival)
 "p" = (
 /obj/effect/turf_decal/tile/neutral/fourcorners,
@@ -184,8 +183,7 @@
 /obj/effect/turf_decal/tile/neutral{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/shuttle/arrival)
 "s" = (
 /obj/machinery/holopad,
@@ -257,8 +255,7 @@
 /obj/effect/turf_decal/tile/neutral{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/shuttle/arrival)
 "B" = (
 /obj/structure/table/reinforced,

_maps/shuttles/emergency_delta.dmm

@@ -193,8 +193,7 @@
 /obj/effect/turf_decal/tile/neutral{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/shuttle/escape)
 "ap" = (
 /obj/item/kirbyplants{
@@ -956,8 +955,7 @@
 /obj/effect/turf_decal/tile/neutral{
 	dir = 8
 	},
-/turf/open/floor/iron{
-	},
+/turf/open/floor/iron,
 /area/shuttle/escape)
 "cB" = (
 /obj/structure/chair/comfy/shuttle{

tools/ci/check_grep.sh

@@ -205,6 +205,12 @@ fi;
 
 if [ "$pcre2_support" -eq 1 ]; then
 	section "regexes requiring PCRE2"
+	part "empty variable values"
+	if $grep -PU '{\n\t},' $map_files; then
+		echo
+		echo -e "${RED}ERROR: Empty variable value list detected in map file. Please remove the curly brackets entirely.${NC}"
+		st=1
+	fi;
 	part "to_chat sanity"
 	if $grep -P 'to_chat\((?!.*,).*\)' $code_files; then
 		echo