Cleanup after my last diff, following suggestions by mordante,

...Sapient, and stikonas.

data/campaigns/Descent_Into_Darkness/units/iceball.cfg

@@ -17,7 +17,7 @@
     advances_to=null
     cost=1
     usage=fighter
-    description=_ "A Fireball. This is not to be used for anything else than a 'Move_Unit_Fake'!"
+    description=""	# wmllint: ignore
     hide_help=true
     do_not_list=yes
 [/unit_type]

data/campaigns/Legend_of_Wesmere/scenarios/16_The_Chief_must_die_utils.cfg

@@ -2,7 +2,7 @@
 #define INVISIBILITY_POTION USER_ID
     [object]
         id=invisibility_potion_{USER_ID}
-        description= _ "{USER_ID} taken Crelanu's Potion" #wmllint: ignore
+        description= _ "Crelanu's philter affecting " + {USER_ID}
         duration=level
         [filter]
             id={USER_ID}

data/campaigns/Legend_of_Wesmere/utils/low-macros.cfg

@@ -26,7 +26,7 @@
 #define LOOT AMOUNT SIDE
     [message]
         speaker=narrator
-        message= _ "You retrieve {AMOUNT} pieces of gold." # wmllint: ignore
+        message= _ "You retrieve " + {AMOUNT} + _ " pieces of gold."
         image=wesnoth-icon.png
     [/message]
 
@@ -221,7 +221,7 @@
 
         [message_debug]
             logger=warn
-            message=_ "Village at {X}, {Y} to side {SIDE}"	# wmllint: ignore
+            message="village at {X}, {Y} to side {SIDE}"	# wmllint: ignore
         [/message_debug]
     [/event]
 #enddef

data/core/units/fake/Fog_Clearer.cfg

@@ -16,7 +16,7 @@
     advances_to=null
     cost=1
     usage=scout
-    description=_ "Dummy unit for clearing fog hexes."
+    description=_ ""	# wmllint: ignore
     hide_help=true
     do_not_list=yes
 [/unit_type]