Re: Feature request: Improve diff algorithm

> Here is another place where diff can be improved:
> @@ -141,8 +140,9 @@ My_runops(pTHX)
>                 // Do not trace variables in DB:: module
>                 if( SvOK( inDB ) ) continue;
>
> -               sv_inc_nomg( inDB );
>
> +               // save_item( inDB );
> +               sv_inc_nomg( inDB );
>                 dSP; SINFO; SAVETMPS;
>
>                 // printf( "SWITCH\n" );
>
>
> This would be better it the patch looks like:
> ( this patch is manually created just to light the idea. It may contain errors)
> @@ -140,6 +140,7 @@ My_runops(pTHX)
>          // Do not trace variables in DB:: module
>          if( SvOK( inDB ) ) continue;
>
> +
> +        // save_item( inDB );
>          sv_inc_nomg( inDB );
> -
>          dSP; SINFO; SAVETMPS;
>
> As we can see, here the `sv_inc_nomg( inDB );` line is unchanged and `// save_item( inDB );` is added.
> Here we just add/remove empty lines and patch looks more better.
>
> I think (and this is my assumption), the the diff algorithm should take into account the string length.
> This is more better to add/remove more short lines
>