Update .gitignore

.gitignore

@@ -39,7 +39,7 @@ pip-log.txt
 pip-delete-this-directory.txt
 
 # Unit test / coverage reports
-htmlcov/
+html.cov/
 .tox/
 .nox/
 .coverage
@@ -48,7 +48,7 @@ htmlcov/
 nosetests.xml
 coverage.xml
 *.cover
-*.py,cover
+*.py.cover
 .hypothesis/
 .pytest_cache/
 
@@ -127,4 +127,4 @@ venv.bak/
 dmypy.json
 
 # Pyre type checker
-.pyre/
+.pyre/