changeset: change margins on commit message so it fits the page better Previously, margins were used to visually separate commit message from author. Because of the left margin, it looked a bit out of place, so let's instead remove the left margin and increase the top one. This way it aligns better with surrounding blocks. Making commit message stand on its own on the page is now delegated to just monospace font. The difference with other blocks is not huge, but the whole theme is kinda minimalistic, so it should work.