style: Remove unnecessary spaces around concatenation operators in ValidateSignatureFlexible middleware.

app/Http/Middleware/ValidateSignatureFlexible.php

@@ -1,36 +1,36 @@
-<?php
-
-namespace App\Http\Middleware;
-
-use Closure;
-use Illuminate\Http\Request;
-
-class ValidateSignatureFlexible
-{
-    public function handle(Request $request, Closure $next)
-    {
-        $signature = $request->query('signature');
-
-        if (! $signature) {
-            abort(403);
-        }
-
-        // Pakai APP_URL, bukan request scheme
-        $baseUrl = rtrim(config('app.url'), '/') . '/' . ltrim($request->path(), '/');
-
-        $query = collect($request->query())
-            ->except('signature')
-            ->map(fn ($value, $key) => $key.'='.$value)
-            ->implode('&');
-
-        $original = rtrim($baseUrl.'?'.$query, '?');
-
-        $expected = hash_hmac('sha256', $original, config('app.key'));
-
-        if (! hash_equals($expected, $signature)) {
-            abort(403, 'Invalid signature.');
-        }
-
-        return $next($request);
-    }
-}
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+
+class ValidateSignatureFlexible
+{
+    public function handle(Request $request, Closure $next)
+    {
+        $signature = $request->query('signature');
+
+        if (! $signature) {
+            abort(403);
+        }
+
+        // Pakai APP_URL, bukan request scheme
+        $baseUrl = rtrim(config('app.url'), '/').'/'.ltrim($request->path(), '/');
+
+        $query = collect($request->query())
+            ->except('signature')
+            ->map(fn ($value, $key) => $key.'='.$value)
+            ->implode('&');
+
+        $original = rtrim($baseUrl.'?'.$query, '?');
+
+        $expected = hash_hmac('sha256', $original, config('app.key'));
+
+        if (! hash_equals($expected, $signature)) {
+            abort(403, 'Invalid signature.');
+        }
+
+        return $next($request);
+    }
+}