fix: add back empty string in command line split

this fixes file completion in normal usage without
using quotes. it basically cut out the space at the
end which prevented normal usage without adding an
additional space or using quotes for file
completion

complete.go

@@ -27,6 +27,9 @@ func splitQuote(str string) []string {
 			sb.WriteRune(r)
 		}
 	}
+	if strings.HasSuffix(str, " ") {
+		split = append(split, "")
+	}
 
 	if sb.Len() > 0 {
 		split = append(split, sb.String())