I think the simple table markup also figures out the column width automatically based on the content (and the list-table probably does the same if you omit the width, unless you want consistency between the tables).

No, it doesn't. The table is formatted this way because I configured the columns to be a 50/50 split, which I experimentally found to look the least awful. Unfortunately, while sphinx allows to set percentages for the table columns' widths it doesn't allow to do so for the table itself. Anyways, I'd like to keep the makup as is in this PR.