Changed capitalization of eV.

Even though Volt units are capitalized V, when you write code apparently
conventions older than computers themselves are rejected in favour of
newer conventions.

modules/test/test_tfw.py

@@ -42,7 +42,7 @@ class TestTfw(unittest.TestCase):
 
     def test_mev(self):
         input = Mock(group=lambda x: '24060')
-        tfw.tfweV(self.phenny, input)
+        tfw.tfwev(self.phenny, input)
 
         out = self.phenny.say.call_args[0][0]
         m = re.match('^[\-\d\.]+ meV‽ .* \- .* \- [A-Z]{4} \d{2}:\d{2}Z$', out,