test: Fix a few coverage pragma.

caucase/test.py

@@ -303,7 +303,7 @@ def print_buffer_on_error(func):
     """
     try:
       return func(self, *args, **kw)
-    except Exception: # pragma : no cover
+    except Exception: # pragma: no cover
       sys.stdout.write(utils.toBytes(os.linesep))
       sys.stdout.write(self.caucase_test_output.getvalue())
       raise
@@ -2321,7 +2321,7 @@ class CaucaseTest(unittest.TestCase):
           user2_new_key_path,
         ),
       )
-    except SystemExit as e:
+    except SystemExit as e: # pragma: no cover
       if e.code:
         raise