Fix some spelling errors.

app/Import/Converter/AmountDebit.php

@@ -0,0 +1,45 @@
+<?php
+/**
+ * AmountDebit.php
+ * Copyright (c) 2017 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+declare(strict_types=1);
+
+namespace FireflyIII\Import\Converter;
+
+/**
+ * Class AmountDebit
+ */
+class AmountDebit implements ConverterInterface
+{
+    /**
+     * @param $value
+     *
+     * @return string
+     */
+    public function convert($value): string
+    {
+        /** @var ConverterInterface $converter */
+        $converter = app(Amount::class);
+        $result    = $converter->convert($value);
+        $result    = app('steam')->positive($result);
+        $result    = bcmul($result, '-1');
+
+        return $result;
+    }
+}