coverage-4.0a6 compatibility

coverage 4.0a6 no longer generates .coverage file, so
check first if it exists before attempting removal.

1 files changed, 2 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index f9af20f..c83e02b 100644
--- a/setup.py
+++ b/setup.py
@@ -77,7 +77,8 @@ class Check(Command):
             subprocess.check_call(
                 ['python', '-m', 'CoverageTestRunner',
                  '--ignore-missing-from', 'without-tests'])
-            os.remove('.coverage')
+            if os.path.exists('.coverage'):
+                os.remove('.coverage')
 
         subprocess.check_call(['./cmdtest', 'echo-tests'])
         subprocess.check_call(['./cmdtest', 'sort-tests'])