Update dependency coverage to v7.12.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
coverage	7.11.3 -> 7.12.0

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Release Notes

coveragepy/coveragepy (coverage)

v7.12.0

Compare Source

• The HTML report now shows separate coverage totals for statements and
  branches, as well as the usual combined coverage percentage. Thanks to Ryuta
  Otsuka for the discussion <issue 2081_>_ and the implementation <pull 2085_>_.

• The JSON report now includes separate coverage totals for statements and
  branches, thanks to Ryuta Otsuka <pull 2090_>_.

• Fix: except* clauses were not handled properly under the "sysmon"
  measurement core, causing KeyError exceptions as described in issue 2086_.
  This is now fixed.

• Fix: we now defend against aggressive mocking of open() that could cause
  errors inside coverage.py. An example of a failure is in issue 2083_.

• Fix: in unusual cases where a test suite intentionally exhausts the system's
  file descriptors to test handling errors in open(), coverage.py would
  fail when trying to open source files, as described in issue 2091_. This
  is now fixed.

• A small tweak to the HTML report: file paths now use thin spaces around
  slashes to make them easier to read.

.. _issue 2081: #​2081
.. _issue 2083: #​2083
.. _pull 2085: #​2085
.. _issue 2086: #​2086
.. _pull 2090: #​2090
.. _issue 2091: #​2091

.. _changes_7-11-3:

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