Fix minor errors picked up by Marc.

Author: drvinceknight

axelrod/result_set.py

@@ -707,7 +707,8 @@ def __ne__(self, other):
 
 class ResultSetFromFile(ResultSet):
     """
-    Read the result set directly from file.
+    A class to hold the results of a tournament. Reads in a CSV file produced
+    by the tournament class.
     """
 
     def __init__(self, filename, progress_bar=True,

axelrod/tournament.py

@@ -87,7 +87,7 @@ def play(self, build_results=True, filename=None,
 
         Returns
         -------
-        axelrod.ResultSet
+        axelrod.ResultSetFromFile
         """
         if progress_bar:
             self.progress_bar = tqdm.tqdm(total=len(self.match_generator),