Reworking triggered ability text generation to allow for ability words and flavor words to be added more easily (#8010)

* refactor all instances of getRule in triggered abilities using new getTriggerPrefix method

* updated triggered ability rules generation

* renamed method

* fixed a test failure

* some more refactoring

* simplified some instances of ability word usage

Mage/src/main/java/mage/constants/AbilityWord.java

@@ -1,5 +1,7 @@
 package mage.constants;
 
+import mage.util.CardUtil;
+
 /**
  * @author LevelX2
  */
@@ -55,7 +57,7 @@ public enum AbilityWord {
     }
 
     public String formatWord() {
-        return "<i>" + this + "</i> &mdash; ";
+        return CardUtil.italicizeWithEmDash(this.toString());
     }
 
     @Override