Fix condition box yacc syntax

mscparser/mscparser.py

@@ -422,7 +422,7 @@ class MscParser:
     # X.X Conditions (TODO CHECK CHAPTER IN MSC STANDARD)
     #**************************************************************************
     def p_condition(self, p):
-        u"""condition_statement : CONDITION 'NAME'"""
+        u"""condition_statement : CONDITION CHARSTRING"""
         self.makerMsc.newCondition(p[2], self.makerMsc.Condition)
 
     #*************************************************************************