documentation error 

```
import pendulum

# The most typical usage is for comments
# The instance is the date the comment was created
# and its being compared to default now()
pendulum.now().subtract(days=1).diff_for_humans()
'5 days ago'
```

```
In [2]: import pendulum

In [3]: pendulum.now().subtract(days=1).diff_for_humans()
Out[3]: '1 day ago'
```