py3: port string formatting
`skipped` is a set of integer revs here. So cast integers to
strings using %d.
None doesn't cast to an empty string on Python 3. So use '' explicitly.
Differential Revision: https://phab.mercurial-scm.org/D2146
--- a/hgext/rebase.py Thu Jan 25 21:16:28 2018 -0500
+++ b/hgext/rebase.py Sun Feb 11 18:34:22 2018 -0800
@@ -289,7 +289,7 @@
skipped.add(old)
seen.add(new)
repo.ui.debug('computed skipped revs: %s\n' %
- (' '.join(str(r) for r in sorted(skipped)) or None))
+ (' '.join('%d' % r for r in sorted(skipped)) or ''))
repo.ui.debug('rebase status resumed\n')
self.originalwd = originalwd