People have already outlined all the reasons why the long line might be less than optimal, but I will note that really you are using formatting to do styling.

In a post-modern editor (by which I mean any modern editor that takes this kind of thing into consideration which I don't think any do yet) it should be possible for the editor to determine similarity between lines and achieve a tabular layout, perhaps also with styling for dissimilar values in cases where the table has a higher degree of similarity than the one above. Perhaps also with collapsing of tables with some indicator that what is collapsed is not just a sub-tree but a table.