title: How to fix "Content is not allowed in prolog" build error?
body: <p>When I upgraded to Android Studio 0.6.1, I encountered a build issue with asset files. I kept getting "Content is not allowed in prolog" during the mergeDebugResources task. Since I couldn't find a suitable answer to this and have since found a solution, I've answered my own question to help other developers who face this issue.</p>