Environment variables with extra '=' don't work

[codebytere]

To reproduce:

Go to settings, the fill the environment variable section with the placeholder:

Run the Fiddle, and observe failure:

Saving files to temp directory...
Saved files to /var/folders/x_/clmjt4bs0dx09xjy7k3xt1z80000gn/T/electron-fiddle-8492-ufiHikyVXPgI
Electron v9999999.9.9 started.
electron: invalid value for NODE_OPTIONS (unterminated string)

Electron exited with code 9.