fix a small typo

diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst
index 1e1f03ee6fe9e7a1ad3bf3a5a40a10d406acd00e..42e50f6b3b978f8209e10963b9d45e2f67d9b4fb 100644 (file)
--- a/Doc/library/subprocess.rst
+++ b/Doc/library/subprocess.rst
@@ -318,8 +318,8 @@ Replacing /bin/sh shell backquote
    output = Popen(["mycmd", "myarg"], stdout=PIPE).communicate()[0]
 
 
-Replacing shell pipe line
-^^^^^^^^^^^^^^^^^^^^^^^^^
+Replacing shell pipeline
+^^^^^^^^^^^^^^^^^^^^^^^^
 
 ::