Use noalias in assignment

Author: davidbrochart

test/test_xchunk_store_manager.cpp

@@ -145,7 +145,7 @@ namespace xt
         auto a2 = chunked_file_array<double, xio_disk_handler<xio_binary_config>>(shape, chunk_shape, chunk_dir2);
         auto a3 = arange(4 * 4);
         a3.reshape({4, 4});
-        a2 = a3;
+        noalias(a2) = a3;
         a2.chunks().flush();
         // check that a2 has correct chunks
         check_file_equal(chunk_dir2 + "/0.0", xt::xarray<double>({{0, 1}, {4, 5}}));