Import quote() from shlex

The quote() function used to live in pipes module in python2 and, while
an import exists in pipes for backwards compatibility, it seems better
to import from shlex.

Author: dlax

testinfra/backend/base.py

@@ -13,7 +13,7 @@
 import collections
 import locale
 import logging
-import pipes
+import shlex
 import subprocess
 import urllib.parse
 
@@ -168,7 +168,7 @@ def get_hosts(cls, host, **kwargs):
     @staticmethod
     def quote(command, *args):
         if args:
-            return command % tuple(pipes.quote(a) for a in args)
+            return command % tuple(shlex.quote(a) for a in args)
         return command
 
     def get_sudo_command(self, command, sudo_user):