Infinity numbers are exported as null values

Problem Statement/Rationale

Compass exports Infinity values as null values.

Steps to Reproduce

Create a document in an empty collection which contains an Infinity value and then export the collection with Compass in JSON format, for instance:

db.test.insertOne({some_field: Infinity})

Expected Results

The exported JSON file should either contain  

{some_field: Infinity} 

or

{

    some_field: { '$numberDouble': 'Infinity' }

 } 

Actual Results

Compass export Infinity values as null values, so the result would like:

{     some_field:  null   }  

Additional Notes

This was observed with Compass 1.32.4. and 1.31.1.  Version 1.29.4 does not seem to contain this bug.