I have a text file where all columns are merged into a single column and 'rows' are separated by two long rows of '-'. It looks like this:

```
Hash: some_hash_id
Author: some_author
Message: Message about the update

Reviewers: jimbo

Reviewed By: jimbo

Test Plan: Auto-generated

@bypass-lint
Commit Date: 2019-06-30 20:12:38
Modified path: path/to/my/file.php
Modified path: some/other/path/to/my/file.php
Modified path: path/to/other/file.php
-------------------------------------------------------
-------------------------------------------------------
Hash: some_other_hash_id
Author: different_author
Message: Auto generated message

Reviewers: broseph

Reviewed By: broseph

Test Plan: Auto-generated by Sam

@bypass-lint
Commit Date: 2019-06-30 18:09:12
Modified path: my/super/file.php
Modified path: totally/awesome/file.php
Modified path: file/path.json
-------------------------------------------------------
-------------------------------------------------------
Hash: hash_id_4
Author: new_author
Message: Auto DB big update

Reviewers: foo

Reviewed By: foo

Test Plan: Auto-generated by Tom

@bypass-lint
Commit Date: 2019-06-30 11:08:59
Modified path: big/scripts/file.json

```

expected output for this example is is a dataframe with just 3 rows.
dataframe columns: Hash (str), Author (str), Message (str), Reviewers (str), Reviewed By (str), Test Plan (str), Commit Date (timestamp), Modified path (array(str))