Merge branch 'master' into numpy-core-import-update

Author: mtsokol

include/pybind11/numpy.h

@@ -131,9 +131,9 @@ PYBIND11_NOINLINE module_ import_numpy_core_submodule(const char *submodule_name
     /* `numpy.core` was renamed to `numpy._core` in NumPy 2.0 as it officially
         became a private module. */
     if (major_version >= 2) {
-        return py::module_::import((std::string("numpy._core.") + submodule_name).c_str());
+        return module_::import((std::string("numpy._core.") + submodule_name).c_str());
     } else {
-        return py::module_::import((std::string("numpy.core.") + submodule_name).c_str());
+        return module_::import((std::string("numpy.core.") + submodule_name).c_str());
     }
 }
 

include/pybind11/pybind11.h

@@ -1142,7 +1142,7 @@ class cpp_function : public function {
                     }
                     msg += "kwargs: ";
                     bool first = true;
-                    for (auto kwarg : kwargs) {
+                    for (const auto &kwarg : kwargs) {
                         if (first) {
                             first = false;
                         } else {