Ignore pre and post sort logic if script starts with "-"

[Americas]

Use case:

Having prescript, postscript and script should sort based on script, just as it is now. This follows the logic that calling script will behind the scenes call prescript and postscript.

Having pre-script or post-script won't be called when calling script, it will if you call -script, but that makes little sense, I don't think anyone would do that.

With that in mind, I suggest tweaking the sort algorithm to ignore these cases so they can be sorted into their natural places.