Usage: trimgin [FILE]

Remove leading and trailing whitespace from text.
If FILE is not provided, read from stdin.

For example:

```text.txt


Hi there!
We have two blank lines above and below this text.
And this space will be removed by 'trimgin'.


```

```terminal
$ trimgin text.txt
Hi there!
We have two blank lines above and below this text.
And this space will be removed by 'trimgin'.
```