anim_diff: add a couple missing newlines in Help()
anim_diff: add a couple missing newlines in Help()

Change-Id: Iad2a4ad2555718f1822b82d38219940ed49385b8

webmproject/libwebp,PKRoma/libwebp,webmproject/libwebp,PKRoma/libwebp,PKRoma/libwebp,PKRoma/libwebp,PKRoma/libwebp,webmproject/libwebp,PKRoma/libwebp,webmproject/libwebp,webmproject/libwebp