When a table is showing the contents of a CSV file, it should look
something like a spreadsheet.
The minimally skeuomorphic way to do this is by adding row numbers.
This commit doesn’t
- make the row numbers monospace (it’s barely noticeable and doesn’t
reflect what actual spreadsheets do)
- make the first column heading ‘Row’ (again, doesn’t reflect how actual
spreadsheets work, and takes up more valuable space)
