Inspecting db.collection.aggregate() shows hardcoded test checks

When using the shell from todays master and "introspecting" the aggregation helper (leaving out the parenthesis) exposes a weird looking comment that feels creepy.

> db.messages.aggregate

function (pipeline, extraOpts) {

    var cmd = {pipeline: pipeline};

....

    if (TestData && !('batchSize' in cmd.cursor)) {

        // If we are running in a test, set batchsize to 0 to make sure it works across a GetMore

        cmd.cursor.batchSize = 0;

    }

....

}

Exposing normal users to this comment, and global variable test (who knows, maybe the user is using that variable for his own tests), feels very wrong and dirty.