sed – need an example for ”\digit”

[Johnny Rosenberg]

http://www.delorie.com/gnu/docs/sed/sed_5.html

On that page saw this:

”\digit
Matches the digit-th \(...\) reference in the regular expression.”

But I failed to create an example that works.
Anyone?



Kind regards

Johnny Rosenberg
ジョニー・ローゼンバーグ