This layout change and the one below is strange.  Actually I think this is part of the work of the previous precalc pull request where I was working on the key terms layout.  It is perhaps due to me utilizing the economics-fixes branch as part of the first pass at precalc fixes.  For the economics fixes I was careful to only work in economics.less in order to not introduce any possible regressions in our other books (history, psychology, precalc)  I think this one above is ok due to just being layout change.