don't return uninitialized memory from bdiff.blocks()
bdiff.blocks() returns a dummy match at the end of both files; the
length of that chunk is never set, so it will sometimes contain random
heap garbage. There are apparently workarounds for this elsewhere:
# bdiff sometimes gives huge matches past eof, this check eats them,
%%% should show a removed and b added
A b
R a
reverting...
undeleting a
forgetting b
%%% should show b unknown and a back to normal
? b
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
merging a
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
%%% should show foo-b
foo-b
%%% should show a removed and b added
A b
R a
%%% revert should fail
abort: uncommitted merge - please provide a specific revision
%%% revert should be ok now
undeleting a
forgetting b
%%% should show b unknown and a marked modified (merged)
? b
%%% should show foo-b
foo-b