verify: fix "missing revlog!" errors for revlog format v0 and add test
With revlog format v0 the .d files are empty if the only revision stored is an
empty file. Since Mercurial can no longer create format v0 repositories, but
still use it, add a script which creates a repository with a single empty file.
This can be used in other tests if wanted.
1 files updated, 0 files merged, 2 files removed, 0 files unresolved
searching for copies back to rev 1
unmatched files in other:
b
c
all copies found (* = to merge, ! = divergent):
c -> a *
b -> a *
checking for directory renames
resolving manifests
overwrite None partial False
ancestor 583c7b748052 local fb3948d97f07+ remote 7f1309517659
a: remote moved to c -> m
a: remote moved to b -> m
preserving a for resolve of b
preserving a for resolve of c
removing a
updating: a 1/2 files (50.00%)
picked tool 'internal:merge' for b (binary False symlink False)
merging a and b to b
my b@fb3948d97f07+ other b@7f1309517659 ancestor a@583c7b748052
premerge successful
updating: a 2/2 files (100.00%)
picked tool 'internal:merge' for c (binary False symlink False)
merging a and c to c
my c@fb3948d97f07+ other c@7f1309517659 ancestor a@583c7b748052
premerge successful
0 files updated, 2 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
-- b --
0
1
2
-- c --
0
1
2