Corrected typo

transition_machine/src/Oracle.cpp

@@ -689,7 +689,7 @@ void Oracle::explainCostOfAction(FILE * output, Config & c, const std::string &
           }
           else if (headGov == s)
           {
-            fprintf(output, "The current getHead()\'s governor is on the stack %d(%s)\n", s, c.getTape("FORM").getRef(s-head).c_str());
+            fprintf(output, "The current head\'s governor is on the stack %d(%s)\n", s, c.getTape("FORM").getRef(s-head).c_str());
             return;
           }
         }