Line returns added in serialized function when running through jest

I always get the weirdest issues. So, serialize-javascript works fine in actual production, but it somehow outputs a different thing while running a test. In the example of the object with all the types including the function, I get an odd line return within the serialized function.

Environment:

• Node 14.13.0
• Jest 26.5.2
• serialize-javascript 5.0.1

Reproduction:
(Alternatively, see https://gist.github.com/eslachance/6dbd88820f09de4509d4f19c4c0e7ad6 for reproduction)

• Create a jest test
• import serialize-javascript
• Add a console.log of the serialized example.

test("serializes javascript", () => {
  console.log(serialize({
    str  : 'string',
    num  : 0,
    obj  : {foo: 'foo'},
    arr  : [1, 2, 3],
    bool : true,
    nil  : null,
    undef: undefined,
    inf  : Infinity,
    date : new Date("Thu, 28 Apr 2016 22:02:17 GMT"),
    map  : new Map([['hello', 'world']]),
    set  : new Set([123, 456]),
    fn   : function echo(arg) { return arg; },
    re   : /([^\s]+)/g,
    big  : BigInt(10),
  }))
});

Expected result:

{"str":"string","num":0,"obj":{"foo":"foo"},"arr":[1,2,3],"bool":true,"nil":null,"undef":undefined,"inf":Infinity,"date":new Date("2016-04-28T22:02:17.000Z"),"map":new Map([["hello","world"]]),"set":new Set([123,456]),"fn":function echo(arg) { return arg; },"re":new RegExp("([^\\s]+)", "g"),"big":BigInt("10")}

Actual Result:

    {"str":"string","num":0,"obj":{"foo":"foo"},"arr":[1,2,3],"bool":true,"nil":null,"undef":undefined,"inf":Infinity,"date":new Date("2016-04-28T22:02:17.000Z"),"map":new Map([["hello","world"]]),"set":new Set([123,456]),"fn":function echo(arg) {
          return arg;
        },"re":new RegExp("([^\\s]+)", "g"),"big":BigInt("10")}

The expected result was a simple nodejs file which outputs the serialized data and nothing else.

This is confusing me very much, and I don't know where to begin in troubleshooting it.

Start with the Jest test reproduction described in the issue and compare its output with the standalone Node.js result and the linked gist. Done means the serialized example produces the expected function formatting without inserted line breaks when run through Jest.