Add quotes around scenario name in error message

1 files changed, 1 insertions, 1 deletions

diff --git a/yarn b/yarn
index 842f308..288e23b 100755
--- a/yarn
+++ b/yarn
@@ -157,7 +157,7 @@ class YarnRunner(cliapp.Application):
 
         if len(matching) == 0:
             raise cliapp.AppException(
-                'Scenario %s, step "%s %s" has no matching '
+                'Scenario "%s", step "%s %s" has no matching '
                 'implementation' %
                 (scenario.name, step.what, step.text))
         if len(matching) > 1: