nice to have: accept multiple commands in one line, or a "implicitly list after every command" mode

Nobody has claimed this yet.

I find my self stepping through code with the following key press sequence

```
n l
n l
n l
n l
```

alot!

It would be a nice usability feature to be able issue two commands in a row on one line, e.g. "n l" at once to step to the next line and then view the listing of where I am at, so that subsequently I could just press enter to step and view where I am in one press of .

```
n l

```

Alternatively it could be very nice just to have "listing on" mode, where there is an implicit l (list) command issued after every other command. This would be nice when mixing 'n' and 's' and 'f' ('f' is not yet available, I know :).

Start by locating the command handling for the n, l, s, and f commands described in the issue. Decide whether command chaining or an implicit listing mode is supported, then verify that repeated Enter presses step and display the current listing as requested.

Written by the indexing model from the issue text.