Hi bug-diffutils@gnu.org subscribers.

Commands executed:

Both terminal,  from which patterns are copied, and text editor document, to which pattern is pasted – see attachment –, use mono-space font. Output resulting from 'diff -y a1 a2' contains tabular and point marks in the same row as separators between left'-sided column and right'-sided column. Would it be suitable according to developers to produce separators relying on a unique mark – tabular or point – ?

As noticeable, the tool Diff allows for options combinations that cannot cohabit together because of their very features. A way for Diff to avoid handling such combinations would be appropriate. Here is an illustration of such combinations:

Regards, R.T.