fix typos

core/src/main/java/hudson/model/Items.java

@@ -116,7 +116,7 @@ public class Items {
     }
 
     /**
-     * Returns all the registered {@link TopLevelItemDescriptor}s that the current security principle is allowed to
+     * Returns all the registered {@link TopLevelItemDescriptor}s that the current security principal is allowed to
      * create within the specified item group.
      *
      * @since 1.582
@@ -126,7 +126,7 @@ public class Items {
     }
 
     /**
-     * Returns all the registered {@link TopLevelItemDescriptor}s that the specified security principle is allowed to
+     * Returns all the registered {@link TopLevelItemDescriptor}s that the specified security principal is allowed to
      * create within the specified item group.
      *
      * @since 1.582

core/src/main/java/hudson/security/ACL.java

@@ -102,11 +102,11 @@ public abstract class ACL {
         }
     }
     /**
-     * Checks if the given principle has the permission to create top level items within the specified item group.
+     * Checks if the given principal has the permission to create top level items within the specified item group.
      * <p>
      * Note that {@link #SYSTEM} can be passed in as the authentication parameter,
      * in which case you should probably just assume it has can create anything.
-     * @param a the principle.
+     * @param a the principal.
      * @param c the container of the item.
      * @param d the descriptor of the item to be created.
      * @return false