Comment 8 for bug 209537

Thomas Dickey (dickey-his) wrote :

diffstat already has a -w option which can be used to achieve the same result.
Making it respond to the environment variable would change existing uses.

man diffstat

       -w number
              specify the maximum width of the histogram. The histogram will
              never be shorter than 10 columns, just in case the filenames get
              too large.