Fix PEP-8 violation in argparse usage example (similar examples in argparse.rst do follow PEP-8)

Doc/whatsnew/3.2.rst

@@ -100,18 +100,18 @@ or more positional arguments is present, and making a required option::
 
     import argparse
     parser = argparse.ArgumentParser(
-                description = 'Manage servers',         # main description for help
-                epilog = 'Tested on Solaris and Linux') # displayed after help
+                description='Manage servers',           # main description for help
+                epilog='Tested on Solaris and Linux')   # displayed after help
     parser.add_argument('action',                       # argument name
-                choices = ['deploy', 'start', 'stop'],  # three allowed values
-                help = 'action on each target')         # help msg
+                choices=['deploy', 'start', 'stop'],    # three allowed values
+                help='action on each target')           # help msg
     parser.add_argument('targets',
-                metavar = 'HOSTNAME',                   # var name used in help msg
-                nargs = '+',                            # require one or more targets
-                help = 'url for target machines')       # help msg explanation
+                metavar='HOSTNAME',                     # var name used in help msg
+                nargs='+',                              # require one or more targets
+                help='url for target machines')         # help msg explanation
     parser.add_argument('-u', '--user',                 # -u or --user option
-                required = True,                        # make it a required argument
-                help = 'login as user')
+                required=True,                          # make it a required argument
+                help='login as user')
 
 Example of calling the parser on a command string::