tests/test-basic.out

Fix tests for short changeset hashes and hidden manifest hashes

+ mkdir t
+ cd t
+ hg init
+ echo a
+ hg add a
+ hg commit -m test -d '0 0'
+ hg history
changeset:   0:acb14030fe0a
tag:         tip
user:        test
date:        Thu Jan  1 00:00:00 1970
summary:     test

+ hg manifest
b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 644 a
+ hg cat a
a
+ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions