git-update-dirs: Make -t/--test the first action

But after -E/--exec-before, of course.

5a20eb30-25e1-11e3-9638-f0def1836eb5
yd: Split command over several lines

9b7120f2-25e4-11e3-b3d4-f0def1836eb5
yd: Download English and Norwegian subtitles if available

ac35463e-25e4-11e3-8a4d-f0def1836eb5