This is quite messy... However, if you need to do it, you could always build the tag manually.
<a href="@(Url.Action("Edit", "_SoftwareRequestEdit", "SoftwareRequest"))/#= ID #">Edit</a>
Please note, I have not tested this code...
Edit: It may in fact give you what you need, because most browsers will url encode whatever is in the "a" tag anyway as spaces are not a valid url character: http://www.w3schools.com/tags/ref_urlencode.asp