lib/repo: Reindent some code in regenerate_summary() for clarity
lib/repo: Reindent some code in regenerate_summary() for clarity

This makes it a bit more easily separable from the rest of the code in
the function. No functional changes.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

Closes: #911
Approved by: cgwalters

GNOME/ostree,GNOME/ostree,GNOME/ostree,GNOME/ostree,GNOME/ostree