Trivial: add the missing period

This patch adds the missing period in notes of BaseIOBackend.

Change-Id: If43d300239f9f72d5d62b85aa38e59763fe709e0

cloudkitty/backend/__init__.py

@@ -40,7 +40,7 @@ class BaseIOBackend(object):
     @abc.abstractmethod
     def seek(self, offset, from_what=0):
         # 0 beg, 1 cur, 2 end
-        """Change position in the backend
+        """Change position in the backend.
 
         """
 
@@ -59,7 +59,7 @@ class BaseIOBackend(object):
 
     @abc.abstractmethod
     def read(self):
-        """Read data from the backend
+        """Read data from the backend.
 
         :return str: Data read from the backend.
         """