Generate a diffstat. By default, as much space as necessary
will be used for the filename part, and the rest for the graph
part. Maximum width defaults to terminal width, or 80 columns
- if not connected to a terminal, and can be overriden by
+ if not connected to a terminal, and can be overridden by
`<width>`. The width of the filename part can be limited by
giving another width `<name-width>` after a comma. The width
of the graph part can be limited by using