Fix DSUB footprint names, path and formatting inside descriptions

This mainly fixes a formatting problem reported in kicad-footprints#2501.

Sample diff:

--- a/Connector_Dsub.pretty/DSUB-15-HD_Female_Horizontal_P2.29x1.98mm_EdgePinOffset3.03mm_Housed_MountingHolesOffset4.94mm.kicad_mod
+++ b/Connector_Dsub.pretty/DSUB-15-HD_Female_Horizontal_P2.29x1.98mm_EdgePinOffset3.03mm_Housed_MountingHolesOffset4.94mm.kicad_mod
@@ -3,12 +3,12 @@
        (generator "pcbnew")
        (generator_version "8.0")
        (layer "F.Cu")
-       (descr "15-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, female, pitch 2.29x1.98mm, pin-PCB-offset 3.0300000000000002mm, distance of mounting holes 25mm, distance of mounting holes to PCB edge 4.9399999999999995mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf")
-       (tags "15-pin D-Sub connector horizontal angled 90deg THT female pitch 2.29x1.98mm pin-PCB-offset 3.0300000000000002mm mounting-holes-distance 25mm mounting-hole-offset 25mm")
+       (descr "15-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, female, pitch 2.29x1.98mm, pin-PCB-offset 3.03mm, distance of mounting holes 25mm, distance of mounting holes to PCB edge 4.94mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf")
+       (tags "15-pin D-Sub connector horizontal angled 90deg THT female pitch 2.29x1.98mm pin-PCB-offset 3.03mm mounting-holes-distance 25mm mounting-hole-offset 4.94mm")
        (property "Reference" "REF**"
                (at -4.315 -2.61 0)
                (layer "F.SilkS")

@cpresser @kliment1