FIX : cope with cmap from #1322 (#1372)

Cope with cmap where the range contains first and last code are on variable length.

Also fixes cases where the code is on 3 characters only (not standard).
No test data is available.

Fixes #1322

PyPDF2/_cmap.py

@@ -1,5 +1,6 @@
 import warnings
 from binascii import unhexlify
+from math import ceil
 from typing import Any, Dict, List, Tuple, Union, cast
 
 from ._codecs import adobe_glyphs, charset_encoding
@@ -267,9 +268,9 @@ def parse_bfrange(
 ) -> Union[None, Tuple[int, int]]:
  lst = [x for x in l.split(b" ") if x]
  closure_found = False
- nbi = len(lst[0])
- map_dict[-1] = nbi // 2
- fmt = b"%%0%dX" % nbi
+ nbi = max(len(lst[0]), len(lst[1]))
+ map_dict[-1] = ceil(nbi / 2)
+ fmt = b"%%0%dX" % (map_dict[-1] * 2)
  if multiline_rg is not None:
  a = multiline_rg[0] # a, b not in the current line
  b = multiline_rg[1]