[MIRROR] Grammar fixes to atom descriptions (#3165)

* Grammar fixes to atom descriptions

* compile errors

code/game/objects/effects/spiders.dm

@@ -2,7 +2,7 @@
 /obj/structure/spider
 	name = "web"
 	icon = 'icons/effects/effects.dmi'
-	desc = "it's stringy and sticky"
+	desc = "It's stringy and sticky."
 	anchored = TRUE
 	density = FALSE
 	max_integrity = 15
@@ -48,7 +48,7 @@
 
 /obj/structure/spider/eggcluster
 	name = "egg cluster"
-	desc = "They seem to pulse slightly with an inner life"
+	desc = "They seem to pulse slightly with an inner life."
 	icon_state = "eggs"
 	var/amount_grown = 0
 	var/player_spiders = 0
@@ -205,7 +205,7 @@
 
 /obj/structure/spider/cocoon
 	name = "cocoon"
-	desc = "Something wrapped in silky spider web"
+	desc = "Something wrapped in silky spider web."
 	icon_state = "cocoon1"
 	max_integrity = 60