diff --git a/data/ai/ais/idle_ai.cfg b/data/ai/ais/idle_ai.cfg
index 320b4820d7d..3609bdde86e 100644
--- a/data/ai/ais/idle_ai.cfg
+++ b/data/ai/ais/idle_ai.cfg
@@ -6,6 +6,6 @@
     # Needs to define at least one stage; otherwise, the default AI will be injected
     # when used with [modify_side]switch_ai or when loading a mid-scenario save
     [stage]
-    	name=empty
+        name=empty
     [/stage]
 [/ai]
diff --git a/data/ai/micro_ais/scenarios/recruiting.cfg b/data/ai/micro_ais/scenarios/recruiting.cfg
index c4da46dee75..a6b2bcf9de1 100644
--- a/data/ai/micro_ais/scenarios/recruiting.cfg
+++ b/data/ai/micro_ais/scenarios/recruiting.cfg
@@ -65,8 +65,8 @@
                 probability=8
             [/probability]
             [probability]
-            	type=Mage
-            	probability=4
+                type=Mage
+                probability=4
             [/probability]
 
             skip_low_gold_recruiting=yes
diff --git a/data/ai/scenarios/scenario-formula-recruitment.cfg b/data/ai/scenarios/scenario-formula-recruitment.cfg
index 41b90372e4f..68043da4bbb 100644
--- a/data/ai/scenarios/scenario-formula-recruitment.cfg
+++ b/data/ai/scenarios/scenario-formula-recruitment.cfg
@@ -56,10 +56,10 @@ Gs^Fp       , Gs^Fp       , Wwf         , Wwf         , Mm          , Rd
         gold=100
 
         [ai]
-        	# Perhaps this should be changed to use new_recruitment
-        	# In that case, the stages could be removed and replaced by
-        	# this one line:
-        	#ai_algorithm=formula_ai
+            # Perhaps this should be changed to use new_recruitment
+            # In that case, the stages could be removed and replaced by
+            # this one line:
+            #ai_algorithm=formula_ai
             [stage]
                 engine=fai
                 name=side_formulas
diff --git a/data/ai/scenarios/scenario-formula.cfg b/data/ai/scenarios/scenario-formula.cfg
index 2353702e9d1..2640ee6cedf 100644
--- a/data/ai/scenarios/scenario-formula.cfg
+++ b/data/ai/scenarios/scenario-formula.cfg
@@ -231,7 +231,7 @@ Gs^Fp       , Gs^Fp       , Wwf         , Wwf         , Mm          , Rd
             [/stage]
 
             [stage]
-            	id=rca_formulas
+                id=rca_formulas
                 name=ai_default_rca::candidate_action_evaluation_loop
                 [candidate_action]
                     engine=fai
diff --git a/data/ai/scenarios/scenario-high_xp_attack.cfg b/data/ai/scenarios/scenario-high_xp_attack.cfg
index fcbfe1a21c8..5b0170e612d 100644
--- a/data/ai/scenarios/scenario-high_xp_attack.cfg
+++ b/data/ai/scenarios/scenario-high_xp_attack.cfg
@@ -158,7 +158,7 @@
                     [modify_side]
                         side=2
                         [ai]
-                        aggression=1
+                            aggression=1
                         [/ai]
                     [/modify_side]
                 [/command]
diff --git a/data/ai/scenarios/scenario-poisoning.cfg b/data/ai/scenarios/scenario-poisoning.cfg
index a62dc3814ae..fe64740d81b 100644
--- a/data/ai/scenarios/scenario-poisoning.cfg
+++ b/data/ai/scenarios/scenario-poisoning.cfg
@@ -139,7 +139,7 @@ Gs^Fp       , Gs^Fp       , Wwf         , Wwf         , Mm          , Rd
         [/unit]
 
         [ai]
-			ai_algorithm=formula_ai_poisoning
+            ai_algorithm=formula_ai_poisoning
         [/ai]
     [/side]
 [/test]