code snippet box copy button copies illegal command

when i go here https://github.com/rust-embedded/book/blob/15c4b8f60b924db32069ff49322dfc106d719b79/src/intro/install/linux.md#packages

and go to the box with the sudo command and click on the copy icon on the right, i copy:

```
$ sudo apt-get install \
  gdb-multiarch \
  openocd \
  qemu-system-arm
```

but `$` is not accepted by my terminal.