I have Visual Studio Online (now VS Team Services) account as a part of my MSDN subscription. I managed to create a project there, set a workspace in my local Visual Studio 2013
It is now possible to edit code directly in your repo on VisualStudio.com. I don't know how long it's been enabled, but I have recently gone in to "correct" small typos, such as when a developer changes a connection string in web.config locally and accidentally commits it. What's really cool is that when you save the file, if it's a git repo, you can automatically create a new branch and pull request with your change at the same time. I find it to be very convenient for very small changes.