Description of aliases and functions are being duplicated

## Desired behaviour

When I create the following alias inside a desk:

~~~bash
# Tmux shortcut
alias t="tmux"
~~~

And add, to the same desk, the following function:

~~~bash
# Do something cool
function tns() {
...
}
~~~

I would to receive the following output when type `desk` (with the desk loaded)

```
global - Common shared configurations

t Tmux shortcut
tns Do something cool
```

## Actual behaviour

When I do that, I receive:
```
global - Common shared configurations

t Tmux shortcut
# Do something cool Do something cool
tns Do something cool
```

## Aditional info

I've noticed that this only happens with aliases that has a high similarity with functions.

For example, I have a `k` alias and a `kl` alias. This won't happen. But if I have a `k` alias and a `kl` function this happens.

Reproduce the issue by creating the shown alias and function in one desk, then run the `desk` command with that desk loaded. Trace how alias and function descriptions are collected and identify why the function comment appears twice; done means each entry is listed once with its description shown once.

Written by the indexing model from the issue text.