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

probability.py

@@ -39,7 +39,7 @@ def break_cipher(fname, candidates, solver, key_fn):
 
     outfmt = 'IoC: {}, interrupt: {}, count: {}, solver: {}'
     for irp_count, score, irp, kl, skips in candidates:
-        stops, upto = db_i.consider(fname, irp, irp_count)
+        stops, upto = db_i.consider(fname, 28 - irp if INVERT else irp, irp_count)
         print(outfmt.format(score, LP.RUNES[irp], len(stops), key_fn.__name__))
         testcase = data[:upto]
         for x in reversed(skips):