ggml : fix trailing whitespace (llama/0)

ggml/src/ggml-backend.c

@@ -256,7 +256,7 @@ GGML_API GGML_CALL void ggml_backend_tensor_memset(struct ggml_tensor * tensor,
     if (!size) {
         return;
     }
-    
+
     GGML_ASSERT(buf->iface.memset_tensor != NULL && "memset not supported by backend buffer");
 
     buf->iface.memset_tensor(buf, tensor, value, offset, size);