Check if script is being launched in subshell or being redirected to file, and make -l to --onelist. This more or less depricates '--onelist' as flag

ponysay.py

@@ -46,6 +46,12 @@ Whether the program is execute in Linux VT (TTY)
 linuxvt = os.environ['TERM'] == 'linux'
 
 
+'''
+Whether the program is launched in subshell/beeing redirected
+'''
+redirected = not sys.stdout.isatty()
+
+
 '''
 The directories where pony files are stored, ttyponies/ are used if the terminal is Linux VT (also known as TTY)
 '''
@@ -99,6 +105,10 @@ class ponysay():
     Starts the part of the program the arguments indicate
     '''
     def __init__(self, args):
+        if args.list and redirected:
+            args.list = False
+            args.onelist = True
+        
         if   args.list:      self.list()
         elif args.linklist:  self.linklist()
         elif args.quoters:   self.quoters()