Spell success correctly.

courgette/courgette_flow.h

Index: courgette/courgette_flow.h
diff --git a/courgette/courgette_flow.h b/courgette/courgette_flow.h
index 9b8cb889126fd1e29c4e86a459aa945c84bee781..e651be7aa25eb42396c9b1dcb39e235f4f4f9ed4 100644
--- a/courgette/courgette_flow.h
+++ b/courgette/courgette_flow.h
@@ -124,7 +124,7 @@ class CourgetteFlow {
   // Reassigns |status_|, and returns true if |C_OK|.
   bool check(Status new_status);
 
-  // check() alternative for functions that return true on succes. On failure
+  // check() alternative for functions that return true on success. On failure
   // assigns |status_| to |failure_mode|.
   bool check(bool success, Status failure_mode);