add deprecations related to events

also minor cleanings

src/main/java/com/denizenscript/denizencore/objects/Argument.java

@@ -211,21 +211,17 @@ public boolean matchesArgumentType(Class<? extends ObjectTag> dClass) {
 
     // Check if this argument matches any of multiple ObjectTag types
     public boolean matchesArgumentTypes(Class<? extends ObjectTag>... dClasses) {
-
         for (Class<? extends ObjectTag> c : dClasses) {
             if (matchesArgumentType(c)) {
                 return true;
             }
         }
-
         return false;
     }
 
     // Check if this argument matches a ListTag of a certain ObjectTag
     public boolean matchesArgumentList(Class<? extends ObjectTag> dClass) {
-
         ListTag list = getList();
-
         return list.isEmpty() || list.containsObjectsFrom(dClass);
     }
 

src/main/java/com/denizenscript/denizencore/objects/core/ListTag.java

@@ -337,17 +337,12 @@ public ListTag addObjects(List<ObjectTag> ObjectTags) {
         return this;
     }
 
-    // Returns if the list contains objects from the specified dClass
-    // by using the matches() method.
     public boolean containsObjectsFrom(Class<? extends ObjectTag> dClass) {
-
-        // Iterate through elements until one matches() the dClass
         for (ObjectTag testable : objectForms) {
             if (CoreUtilities.canPossiblyBeType(testable, dClass)) {
                 return true;
             }
         }
-
         return false;
     }
 

src/main/java/com/denizenscript/denizencore/tags/Attribute.java

@@ -63,10 +63,10 @@ private static AttributeComponent[] separate_attributes(String attributes) {
             if (chr == '[') {
                 braced++;
             }
-            else if (x == attrInp.length - 1) {
+            if (x == attrInp.length - 1) {
                 x2 = x + 1;
             }
-            else if (chr == ']') {
+            if (chr == ']') {
                 if (braced > 0) {
                     braced--;
                 }

src/main/java/com/denizenscript/denizencore/utilities/Deprecations.java

@@ -177,6 +177,10 @@ public class Deprecations {
     public static Warning furnaceTimeTags = new SlowWarning("The furnace_burn_time, cook time, and cook total time tag/mechs have been replaced by _duration instead of _time equivalents (using DurationTag now).");
     public static Warning playerTimePlayedTags = new SlowWarning("The tags player.first_played, last_played, ban_expiration, and ban_created have been replaced by tags of the same name with '_time' added to the end (using TimeTag now).");
 
+    // In Bukkit impl, added 2020/07/19.
+    public static Warning airLevelEventDuration = new SlowWarning("The 'entity changes air level' event uses 'air_duration' context now instead of the old tick count number.");
+    public static Warning damageEventTypeMap = new SlowWarning("The 'entity damaged' context 'damage_[TYPE]' is deprecated in favor of 'damage_type_map', which is operated as a MapTag.");
+
     // ==================== FUTURE deprecations ====================
 
     // In Bukkit impl, Relevant as of 2019/09/25, deprecate officially by 2021.