Expand tests, do code cleanup.

app/Http/Middleware/TrimStrings.php

@@ -24,6 +24,9 @@ namespace FireflyIII\Http\Middleware;
 
 use Illuminate\Foundation\Http\Middleware\TrimStrings as Middleware;
 
+/**
+ * Class TrimStrings
+ */
 class TrimStrings extends Middleware
 {
     /**