Fix 2 instances of "containnig" => "containing"

Author: msabramo

smmap/mman.py

@@ -1,4 +1,4 @@
-"""Module containnig a memory memory manager which provides a sliding window on a number of memory mapped files"""
+"""Module containing a memory memory manager which provides a sliding window on a number of memory mapped files"""
 from .util import (
                     MapWindow,
                     MapRegion,

smmap/util.py

@@ -1,4 +1,4 @@
-"""Module containnig a memory memory manager which provides a sliding window on a number of memory mapped files"""
+"""Module containing a memory memory manager which provides a sliding window on a number of memory mapped files"""
 import os
 import sys
 import mmap