fix few small things

LP/Probability.py

@@ -28,7 +28,7 @@ class Probability(object):
         self.prob = [0] * 29
         for r in numstream:
             self.prob[r] += 1
-        self.N = len(numstream)
+        self.N = sum(self.prob)
 
     def IC(self):
         X = sum(x * (x - 1) for x in self.prob)

LP/RuneText.py

@@ -92,7 +92,7 @@ class RuneText(object):
     def __invert__(self):
         return RuneText([~x for x in self._data])
 
-    def __str__(self):
+    def __repr__(self):
         return f'RuneText<{len(self)}>'
 
     @property