Stop processing when someone else is mentioned in a new paragraph

[koppor]

Describe the bug

I made following comment (see https://github.com/JabRef/abbrv.jabref.org/pull/67#issuecomment-683124304)

@all-contributors please add @jlaehne for doc

(@jlaehne I am testing https://allcontributors.org/, hope that's OK)

The bot added test too:

  "contributors": [
    {
      "login": "jlaehne",
      "name": "Jonas Lähnemann",
      "avatar_url": "https://avatars1.githubusercontent.com/u/7076057?v=4",
      "profile": "https://github.com/jlaehne",
      "contributions": [
        "doc",
        "test"
      ]
    }
  ],

Expected behavior

Bot should add doc only.