Show "error" on failed statements

Author: natanfelles

src/Database.php

@@ -792,7 +792,7 @@ protected function finalizeAddToDebug(
     ) : void {
         $end = \microtime(true);
         $rows = $this->mysqli->affected_rows;
-        $rows = $rows < 0 ? $rows . ' (failed)' : $rows;
+        $rows = $rows < 0 ? 'error' : $rows;
         $this->debugCollector->addData([
             'start' => $start,
             'end' => $end,

tests/Debug/DatabaseCollectorTest.php

@@ -130,6 +130,12 @@ public function testFinalizeAddToDebug() : void
         $data = $this->collector->getData();
         $data = $data[\array_key_last($data)];
         self::assertSame('Foo Bar', $data['statement']);
-        self::assertSame('-1 (failed)', $data['rows']);
+        self::assertSame('error', $data['rows']);
+        $contents = $this->collector->getContents();
+        self::assertStringContainsString('error', $contents);
+        self::assertStringContainsString(
+            \htmlentities($data['description']),
+            $contents
+        );
     }
 }