Remove trailing whitespace.
diff --git a/Doc/library/mmap.rst b/Doc/library/mmap.rst
index 4828935..e85a964 100644
--- a/Doc/library/mmap.rst
+++ b/Doc/library/mmap.rst
@@ -87,7 +87,7 @@
    will be relative to the offset from the beginning of the file. *offset*
    defaults to 0.  *offset* must be a multiple of the PAGESIZE or
    ALLOCATIONGRANULARITY.
-   
+
    This example shows a simple way of using :class:`mmap`::
 
       import mmap