Some lines of base64 encoded content are highlighted

[piotr-dobrogost]

I have blocks of base64 encoded content in my logs. Every line of such a block which starts with a plus sign is highlighted which is confusing.
Why are these lines being highlighted and is there a way to disable highlighting in this case?

Example content from my log (the middle line is highlighted in green):
DLjMdba1tX3ndXwrcEz2ePLkn/s/X14OVf1cAXwduNF14DYYt1Uv+OX2pbFKhnHMyMAnn3yy +YeX+9bcX6zNLOOYAsnklG8qiC+3rbMxhmmMnCiD2TbmCeYHxhUxRfL77oxj+iHHv9y/2n7f tjNjlszO4LKxj6yDxmz/P7gvJZhptFI9AAAAJXRFWHRkYXRlOmNyZWF0ZQAyMDIwLTEyLTAy