I've created a language grammar for the configuration files created by Minecraft Forge. This will allow you to open a config file in GitHub's Atom Editor with (mostly) full and complete syntax highlighting and section folding.
Install a package called: language-minecraft-forge-cfg
And TaDah! You have a fully hackable text editor which enriches your Modded Minecraft Configuration experience. To see a screenshot of the editor in action check out the screenshot in the attachments of this post.