[Bug]: viewable newline characters in the field spec for the annotations by using line after line definition of the labels in the yamle-file

[RoseDeSable]

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Issue Description

Hi,
I use the label-definition, if it is descibed as in the documenntation:

line by line

---

annotations:
name: RetinaNet R101
type: detector
framework: pytorch
spec: |
[
{ "id": 1, "name": "person" },
{ "id": 2, "name": "bicycle" },

    ...

    { "id":89, "name": "hair_drier" },
    { "id":90, "name": "toothbrush" }
  ]      

---

source: https://opencv.github.io/cvat/docs/manual/advanced/serverless-tutorial/#dl-model-as-a-serverless-function

I import the yaml-file and allthing seems to be allwright. But AFTER EXPORTING AND IMPORTING the yaml-file, I see the definitions with viewable newline characters in the file and in the field spec:

spec: ""[\n {\n "name": "7",\n "color": "#aaf0d1",\n "attributes": []\n },\n {\n "name": "4",\n "color": "#ddff33",\n "attributes": []\n },\n {\n "name": "B",\n "color": "#f34a4a",\n "attributes": []\n },\n {\n "name": "background",\n "color": "#000000",\n " ...

Therefore this function is as model unusable for CVAT.

Best Regards
Rose

Expected Behavior

the label-definition without viewable newline characters.

Deployment Method

Docker

Nuclio Version

1.11.24

Additional Information

no