fix for recent coverage/coveralls compatibility issue

.travis.yml

@@ -63,7 +63,7 @@ install:
   - pip install flake8 flake8-import-order
   - pip install tox         # tox 3.11.0 has requirement virtualenv>=14.0.0
   - pip install virtualenv  # virtualenv>=14.0.0 has dropped Python 3.2 support (and pypy3 is based on py32)
-  # Install the tox venv (we make pytest avoid running the test by giving a bad pattern)
+  # tox dryrun to setup the tox venv (we run a mock test).
   - tox -e $(echo py$TRAVIS_PYTHON_VERSION-mg$PYMONGO | tr -d . | sed -e 's/pypypy/pypy/') -- -a "-k=test_ci_placeholder"
   # Install black for Python v3.7 only.
   - if [[ $TRAVIS_PYTHON_VERSION == '3.7' ]]; then pip install black; fi
@@ -82,7 +82,7 @@ script:
 # 0% coverage. That's caused by 'use_2to3', which builds the py3-compatible
 # code in a separate dir and runs tests on that.
 after_success:
-- if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then cat .coverage & coveralls --verbose; fi
+- if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then coveralls --verbose; else echo "coveralls only sent for py27"; fi
 
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