@tfh: idk 
This might as well be ignored, but let's try once more. I addressed this a a while ago, but now I'm gonna give a complete solution.
The table here /wiki/Category:MSX-DOS_Internal_Commands (and possibly elsewhere) seems to deliberately use <br>'s to enforce formatting (preventing columns from growing too wide?) That's bad for a number of reasons, among which:
- br's have semantic meaning (a line break);
- CSS should be used for styling/formatting;
- where the br's are put might not work for everyone (e.g. users with an other than default font set / configuration).
(Of course br's can be used sometimes to quickly add some white space / newline(s), and sometimes they're simply justified, but this definitely feels hacky/abusive.)
It's easy to use CSS to get the result you want without the need to resort to this br hack. I'm not sure what formatting is intended exactly but you could (should) remove the br's and use something like:
{| class="wikitable" border="1" style="max-width: 50em;"
|-
! Command
! MSX-DOS
! style="width: 15%" | Updates
! Short version
! style="width: 47%" | Remarks
|-
That controls the width of the Updates & Remarks columns, and leaves the rest to 'auto'. Of course you can add widths to the other columns as well if you like to control them. The max-width makes sure the table doesn't grow bigger than a certain size based on the font-size (em units) (though I'm not sure max-width is needed in this case).
NB: the table rule table-layout: fixed might come in handy when you want to make sure 2 tables have the exact same column widths (by default table-layout is auto).
