Wrong determination of multi-chunk file name.

[tteko]

I tried to unpack two files i have:
sde_pack_lang_english_dir.vpk and sde_pack_lang_english_000.vpk
by command:

vpk -x . sde_pack_lang_english_dir.vpk

IOError: [Errno 2] No such file or directory: 'sde_pack_lang__000.vpk'

I guess what is about the third underscore character in VPK file name?

[tteko]

Addition.
I tried to rename the files differently and found out that there is 'a forbidden' word in the file name, namely 'english'.
For some reason this word disappears when opening a chunk file!

[NvC-DmN-CH]

Wow it literally looks for the word "english" and replaces it with something else!

vpk/vpk/__init__.py

Line 332 in 3ff641e

path = path.replace('english','').replace("dir.", "%03d." % metadata['archive_index'])

I feel like this was done to make it work for vpk names in a specific game, so the tool may still not be fully reliable with this line removed

[Tiagoquix]

The replacement should be removed or at least an option should be made to ignore it. Getting same error when trying to extract tf2_sound_vo_english_dir.vpk.