code: def test_byte_order_mark():
      assert fix_encoding("ï»¿") == "\ufeff"
  
file_path: python-ftfy/tests/test_characters.py
imports: from ftfy import fix_encoding, fix_encoding_and_explain, fix_text, fix_and_explain, apply_plan
  from ftfy.fixes import remove_control_chars, fix_surrogates
  from ftfy.chardata import possible_encoding
  from ftfy.badness import badness
  import unicodedata
  import sys
label_desc: Use image node_id 2 for calling a global function with example usage: test_byte_order_mark() without return types