add removed files to the changelog file list
- this should allow better detection of removed file
when walking in the history (like hg log)
it doesn't help for the fast path of hg log where
we only look at the filelog
- users of the changelog file list shouldn't assume
anymore that the file still exist (anyway it won't
be found in the manifest like in 5ecf05541e11)
- fix the tests (some hashes changed)
%% no merges expected
%% merge should fail
abort: 'b' already exists in the working dir and differs from remote
%% merge of b expected
merging for b
merging b
%%
Contents of b should be "this is file b1"
This is file b1
%% merge fails
abort: outstanding uncommited changes
%% merge expected!
merging for b
merging b
%% merge of b should fail
abort: outstanding uncommited changes
%% merge of b expected
merging for b
merging b