console.log not being .. compatible with browsers and nodejs

[mstoykov]

Environment

• k6 version: v0.26.2

Expected Behavior

console.log("something", "other", "and", "third");

will print

something other and third

Actual Behavior

INFO[0000] something                                     0=other 1=and 2=third

Steps to Reproduce the Problem

1. run console.log("something", "other", "and", "third");

This is not what either browsers or nodejs does, screenshot from firefox:

I also don't see any useful reason to do it this way, so I propose it's changed to concat the strings and maybe we can add the formatting support at a later stage.

[na--]

I agree, though I think we should probably tackle #1146 at the same time, given that we'll be mucking with type assertions in there