examine signature changed to include distance

- distance is INFINITE, 0, or a positive integer based on get_dist() between
the examiner and examinee's turfs when they are on the same Z. When the
examiner is dead or a ghost, distance is always 0.
- also updates /examine( implementations to use it!
- adds w_class_to_name proc for reusing "It is a X item." examine behavior.

code/modules/power/singularity/collector.dm

@@ -102,9 +102,9 @@ var/global/list/rad_collectors = list()
 		return 1
 	return ..()
 
-/obj/machinery/power/rad_collector/examine(mob/user)
+/obj/machinery/power/rad_collector/examine(mob/user, distance, infix, suffix)
 	. = ..()
-	if(get_dist(user, src) <= 3)
+	if(distance <= 3)
 		. += "The meter indicates that it is collecting [last_power] W."
 
 /obj/machinery/power/rad_collector/ex_act(severity)
@@ -157,4 +157,3 @@ var/global/list/rad_collectors = list()
 		flick("ca_deactive", src)
 	update_icons()
 	return
-

code/modules/power/singularity/emitter.dm

@@ -266,7 +266,7 @@
 		if(src)
 			qdel(src)
 
-/obj/machinery/power/emitter/examine(mob/user)
+/obj/machinery/power/emitter/examine(mob/user, distance, infix, suffix)
 	. = ..()
 	var/integrity_percentage = round((integrity / initial(integrity)) * 100)
 	switch(integrity_percentage)
@@ -288,4 +288,4 @@
 	return burst_delay
 
 /obj/machinery/power/emitter/proc/get_emitter_beam()
-	return new /obj/item/projectile/beam/emitter(get_turf(src))
+	return new /obj/item/projectile/beam/emitter(get_turf(src))

code/modules/power/singularity/particle_accelerator/particle_accelerator.dm

@@ -111,9 +111,9 @@ So, hopefully this is helpful if any more icons are to be added/changed/wonderin
 	src.set_dir(turn(src.dir, 90))
 	return 1
 
-/obj/structure/particle_accelerator/examine(mob/user)
+/obj/structure/particle_accelerator/examine(mob/user, distance, infix, suffix)
 	. = ..()
-	
+
 	switch(construction_state)
 		if(0)
 			. += "Looks like it's not attached to the flooring."
@@ -290,9 +290,9 @@ So, hopefully this is helpful if any more icons are to be added/changed/wonderin
 /obj/machinery/particle_accelerator/update_icon()
 	return
 
-/obj/machinery/particle_accelerator/examine(mob/user)
+/obj/machinery/particle_accelerator/examine(mob/user, distance, infix, suffix)
 	. = ..()
-	
+
 	switch(construction_state)
 		if(0)
 			. += "Looks like it's not attached to the flooring."

code/modules/power/singularity/particle_accelerator/particle_smasher.dm

@@ -36,9 +36,9 @@
 	recipes.Cut()
 	..()
 
-/obj/machinery/particle_smasher/examine(mob/user)
+/obj/machinery/particle_smasher/examine(mob/user, distance, infix, suffix)
 	. = ..()
-	if(Adjacent(user))
+	if(distance < 2)
 		. += "<span class='notice'>\The [src] contains:</span>"
 		for(var/obj/item/I in contents)
 			. += "<span class='notice'>\the [I]</span>"
@@ -378,4 +378,4 @@
 
 	required_atmos_temp_min = 3000
 	required_atmos_temp_max = 10000
-	probability = 1
+	probability = 1