I am trying to replace lines that contain the pattern `"s#_decoded_block["` with `"s#_decoded_block_"`. The command I am using to do that is

```
%s/s\d\+_decoded_block\[/s\d\+_decoded_block_/g

```

I expect to get `"s#_decoded_block_"` as substitutions but instead I am getting `"sd+_decoded_block_"`. Please let me know what I am doing wrong.