This is a page from the Cascading Style Sheets Working Group Blog. Some other places to find information are the “current work” page, the www-style mailing list, the Future of CSS syndicator, and the issue list on Github.
Do you want to know how the CSS WG works? Fantasai has written about:csswg, An Inside View of the CSS Working Group at W3C.
If a shortened line box is too small to contain any content
after the float, thenthat contentthe line box is shifted downward (and its width recomputed)
until eitheritsome content fits or there are no more floats present. Any content in the current line before a floated box is reflowed in thefirst availablesame line on the other side of the float.