Use OneNote, copy-paste of articles, will usually preserve the formatting, and it also adds a helpful link to the original website should you want to visit the source again. It also had a useful screenshot tool that sends the image straight to OneNote. It's free and it works with other MS Office tools. If you create a OneDrive account your onenote syncs with the cloud, allowing you to access it from any machine, and also share it with other people. This is the screenshot of my Onenote where I copy pasted your question into it