+ hg init
+ hg add a
+ hg commit -m 1 -d 0 0
+ hg status
+ hg copy a b
+ hg status
A b
+ hg --debug commit -m 2 -d 0 0
b
 b: copy a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3
+ hg history
changeset:   1:3b5b84850bbe
tag:         tip
user:        test
date:        Thu Jan  1 00:00:00 1970
summary:     2

changeset:   0:c19d34741b0a
user:        test
date:        Thu Jan  1 00:00:00 1970
summary:     1

+ hg log a
changeset:   0:c19d34741b0a
user:        test
date:        Thu Jan  1 00:00:00 1970
summary:     1

566e338d09a089ba737c21e0d3759980  .hg/data/b.d
3268d2f51b2d2d423ff01b59eb6fbb14  bsum
70909ca2ecf494c71e9184b445e040ee  asum
+ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
2 files, 2 changesets, 2 total revisions