Update wordings

Author: alcaeus

src/Eloquent/Builder.php

@@ -174,7 +174,7 @@ public function raw($expression = null)
             $results = iterator_to_array($results, false);
 
             return $this->model->hydrate($results);
-        } // Convert Mongo BSONDocument to a single object.
+        } // Convert MongoDB BSONDocument to a single object.
         elseif ($results instanceof BSONDocument) {
             $results = $results->getArrayCopy();
 

src/Eloquent/Model.php

@@ -55,7 +55,7 @@ abstract class Model extends BaseModel
      */
     public function getIdAttribute($value = null)
     {
-        // If we don't have a value for 'id', we will use the Mongo '_id' value.
+        // If we don't have a value for 'id', we will use the MongoDB '_id' value.
         // This allows us to work with models in a more sql-like way.
         if (! $value && array_key_exists('_id', $this->attributes)) {
             $value = $this->attributes['_id'];