test-extension: fix disabled extension tests for run-tests.py --local
One test that requires inserting a broken extension into hgext does this
by modifying PYTHONPATH. This doesn't work when run with --local because
the 'hg' script being used is in the same directory as the local hgext.
Instead of modifying PYTHONPATH, a secondary extension is enabled using
--config that inserts the dummy hgext at the beginning of sys.path,
before the script's path.
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
created new head
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% Conflicting rebase
merging common
warning: conflicts during merge.
merging common failed!
abort: fix unresolved conflicts with hg resolve then run hg rebase --continue
% Abort
rebase aborted
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o 0: C1