let run-tests run optional code coverage tests. to enable, set env var TEST_COVERAGE to non-empty string. run-tests will print report after running. after coverage run, file tests/.coverage will contain coverage data. use tests/coverage.py to get more info, like annotated source code.

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# HG changeset patch
# User #author#
# Date #date|date#
# Node ID #node#
#parent%changesetparent#
#desc#

#diff#