[tracker-miners] functional-tests: Remove unnecessary newline in error message

[Sam Thursfield <sthursfield src gnome org>]

commit 9a1bdb4568e92a58c09e3195968f2cb5f474e6fd
Author: Sam Thursfield <sam afuera me uk>
Date:   Mon Jul 8 11:02:16 2019 +0100

    functional-tests: Remove unnecessary newline in error message

 tests/functional-tests/common/utils/extractor.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/tests/functional-tests/common/utils/extractor.py 
b/tests/functional-tests/common/utils/extractor.py
index e58128fa0..4dfba5899 100644
--- a/tests/functional-tests/common/utils/extractor.py
+++ b/tests/functional-tests/common/utils/extractor.py
@@ -89,7 +89,7 @@ class TrackerExtractTestCase(ut.TestCase):
         if not isinstance(d, dict):
             self.fail("Expected dict, got %s" % d)
         if key not in d:
-            standardMsg = "Missing: %s\n" % (key)
+            standardMsg = "Missing: %s" % (key)
             self.fail(self._formatMessage(msg, standardMsg))
         else:
             return