fqcn is only treated as namespace if the string ends with backslash, for the phpat selector it should not end with backslash though

Author: CarlosGRodriguezL

Kununu/ArchitectureSniffer/Configuration/Selector/RegexTrait.php

@@ -12,6 +12,10 @@ public function makeRegex(string $path, bool $file = false): string
                 $path = substr($path, 1);
             }
 
+            if (str_ends_with($path, '\\')) {
+                $path = substr($path, 0, -1);
+            }
+
             $path = str_replace('\\', '\\\\', $path);
 
             return '/' . str_replace('*', '.+', $path) . '/';