[calc] Update unit tests to accept new format from WA.

calc.py

@@ -57,7 +57,7 @@ def py(bot, trigger):
 
 @commands('wa', 'wolfram')
 @example('.wa sun mass / earth mass',
-         '[WOLFRAM] M_(.)\/M_(+)  (solar mass per Earth mass) = 332948.6')
+         '[WOLFRAM] M_sun\/M_earth  (solar mass per Earth mass) = 332948.6')
 def wa(bot, trigger):
     """Wolfram Alpha calculator"""
     if not trigger.group(2):