diff --git a/mercurial/progress.py b/mercurial/progress.py
--- a/mercurial/progress.py
+++ b/mercurial/progress.py
@@ -120,7 +120,11 @@
             elif indicator == 'number':
                 if total:
                     padamount = '%d' % len(str(total))
-                    add = ('% '+ padamount + 's/%s') % (pos, total)
+                    # '% 1d' % 1 adds an extra space compared to '% 1s' % 1.
+                    # To avoid this change in output, we convert to a string
+                    # first, then do the padding.
+                    spos = '%d' % pos
+                    add = ('% '+ padamount + 's/%d') % (spos, total)
                 else:
                     add = str(pos)
             elif indicator.startswith('item') and item: