Added test for rpn 2 degrees and fixed rpn to pass it.

plugins/Math.py

@@ -166,7 +166,10 @@ class Math(callbacks.Privmsg):
         stack = []
         for arg in args:
             try:
-                stack.append(complex(arg))
+                x = complex(arg)
+                if x == abs(x):
+                    x = abs(x)
+                stack.append(x)
             except ValueError: # Not a float.
                 if arg in self._mathEnv:
                     f = self._mathEnv[arg]

test/test_Math.py

@@ -49,6 +49,7 @@ class MathTestCase(PluginTestCase, PluginDocumentation):
         self.assertResponse('rpn 1 2 3 +', 'Stack: [1, 5]')
         self.assertResponse('rpn 1 dup', 'Stack: [1, 1]')
         self.assertResponse('rpn 2 3 4 + -', str(2-7))
+        self.assertNotError('rpn 2 degrees')
 
     def testConvert(self):
         self.assertResponse('convert 1 m to cm', '100.0 cm')