moved comment for clarity on modified line

Author: David Nahodyl

src/Database/Eloquent/Relations/BelongsTo.php

@@ -52,9 +52,9 @@ protected function getEagerModelKeys(array $models)
         // First we need to gather all of the keys from the parent models so we know what
         // to query for via the eager loading query. We will add them to an array then
         // execute a "where in" statement to gather up all of those related records.
-        // Unlike other DB Engines FM does not support nulls and uses an empty string instead.
         foreach ($models as $model) {
             $value = $model->{$this->foreignKey};
+            // Unlike other DB Engines FM does not support nulls and uses an empty string instead.
             if (! is_null($value) && $value !== '') {
                 $keys[] = $value;
             }