Everywhere: Run clang-format

Author: https://github.com/IdanHo
Commit: 086969277e
Pull-request: https://github.com/SerenityOS/serenity/pull/12321
Reviewed-by: https://github.com/BertalanD
Reviewed-by: https://github.com/bgianfo ✅

Userland/Libraries/LibCore/DirIterator.h

@@ -28,7 +28,7 @@ public:
 
     bool has_error() const { return m_error != 0; }
     int error() const { return m_error; }
-    const char* error_string() const { return strerror(m_error); }
+    char const* error_string() const { return strerror(m_error); }
     bool has_next();
     String next_path();
     String next_full_path();