  $ echo "(lang dune 2.7)" > dune-project
  $ cat > dune <<'EOF'
  > (executable
  >  (name test)
  >  (instrumentation (backend bisect_ppx)))
  > EOF
  $ dune exec ./test.exe --instrument-with bisect_ppx
  $ bisect-ppx-report cobertura coverage.xml --verbose
  Info: found *.coverage files in './'
  $ cat coverage.xml
  <?xml version="1.0" ?>
  <coverage lines-valid="6" lines-covered="2" line-rate="0.333333">
    <sources>
      <source>.</source>
    </sources>
    <packages>
      <package name="." line-rate="0.333333">
        <classes>
          <class name="test.ml" filename="test.ml" line-rate="0.333333">
            <lines>
              <line number="2" hits="1"/>
              <line number="5" hits="0"/>
              <line number="8" hits="1"/>
              <line number="13" hits="0"/>
              <line number="14" hits="0"/>
              <line number="16" hits="0"/>
            </lines>
          </class>
        </classes>
      </package>
    </packages>
  </coverage>
