spacebar character in index(0) with a file option.

[Constantin1489]

Describe the bug

argv>1
cardcontentsHandle
[' testfile_in_file_option_argparse.txt']
[' testfile_in_file_option_argparse.txt']
Traceback (most recent call last):
  File "/Users/constantinhong/TODO/ankiadderall/addstring.py", line 31, in <module>
    sys.exit(main(sys.argv))
             ^^^^^^^^^^^^^^
  File "/Users/constantinhong/TODO/ankiadderall/addstring.py", line 21, in main
    parse_card(card_candidate, stdDECK, stdTYPE)
  File "/Users/constantinhong/TODO/ankiadderall/create_parser.py", line 204, in parse_card
    with open(afile) as f:
         ^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: ' testfile_in_file_option_argparse.txt'
-f testfile_in_file_option_argparse.txt.ExportedCard

To Reproduce
hash: 7d353b1
$addstring -f testfile_in_file_option_argparse.txt

Note

Expected behavior

cardcontentsHandle
['testfile_in_file_option_argparse.txt']
['testfile_in_file_option_argparse.txt']

So, No spacebar character in index(0).