A wiki tutorial
Well, whatta ya know, Detroit is not the capital of Michigan after all. Lansing is. Don't worry though, the change has already been made on the Michigan guide. For those of you struggling to work out how you're actually supposed to edit this guide, I've included a step-by-step tutorial below, explaining how to make changes in the wiki.
Step 1: Go to the page
Use the search form on the guide's front page to quickly find an article.
Ok, pretty obvious so far, but I did promise this would be a step-by-step tutorial... In my case, I went to the Michigan page and decided to update it with my new-found knowledge. Notice the incorrect data listed on the right side of the page under Quick Facts.
Step 2: Scroll down and hit edit
Once again, pretty straightforward, but there's one thing to notice here. When you're editing a specific section of the article (like the Introduction), you can click the edit button that is located at the top right of the section. If a Quick Facts section already exists for the page, there will also be an edit button at the top of that special section.
Step 3: Make your change in the edit window
As you can see, I have changed the capital city by replacing Detroit with Lansing. I have also added an extra field for the "Largest City", which is Detroit. I guess I just really wanted Detroit to get a mention.
Step 4: Note what changes you made and hit save
Once you've made your changes, it's useful to briefly explain what kind of changes you made. This makes it easier for other people working on the same article to figure out what has been happening on it. Once you've filled this in, hit save.
Step 5: Admire
Voila! Your edit has been made for all to admire. Easy peasy.