Console logger always prints two lines on js_wasm32 platform

[karl-zylinski]

Context

    Odin:    dev-2025-01:1613728a6
    OS:      Windows 10 Professional (version: 22H2), build 19045.5371
    CPU:     Intel(R) Core(TM) i7-6950X CPU @ 3.00GHz
    RAM:     32674 MiB
    Backend: LLVM 18.1.8

Expected Behavior

On js_wasm32 platform, this should log a single line:

log.info("Hellope")

Current Behavior

It logs two lines, something like this:

hello
<empty string>

Failure Information (for bugs)

Steps to Reproduce

In a wasm program, such as vendor/wgpu/examples/glfw, add this to the top of main:

context.logger = log.create_console_logger()
log.info("hello")

Run it, open the web debug console and look. It will print something like:

hello
<empty string>

Note: If you use fmt.println("hello") then it is a single line. So something is up with the path the logger takes.