sn = PRINT_MODE_SHORT_NAME

[english part, russian follow below]

sn is a special mode for filename printing. 

In this mode name in "raw" view (after downloading from IRC/torrent/etc)
replacing by more viewable and compact form.

i.e.

[A-Source_Lililicious]_Maria-sama_ga_Miteru_-_02[f6a600d9].avi

Will be looks like:

[A-Source Lililicious]Maria-sama ga Miteru 02.avi_____________

Underlined space will be used for more detailed description.

Compare:
[A-Source_Lililicious]_Maria-sama_ga_Miteru_-_05[b873a71a].avi 184Mb 640x480
and
[A-Source Lililicious]Maria-sama ga Miteru 05.avi 184Mb 640x480/23m/875Kbps 

This feature useful not only for width-limited devices (like console or
GoldEd window), but for more human-friendly filelists.

sn do following:

1) remove CRC code (upper or lower case) within [] or ()
2) remove combination "_-_" or " - " from name
3) Remove possible space between fansubber group name and filename.
4) Remove duplicate '__' or '  '
5) Replace all '_' with ' ' (spaces)

Russian part of document:

sn - ᯥ樠 ०  ।⠢  䠩   㤮ਬ
. 

筮 ᫥ IRC/WinMX/torrent/etc 䠩 룫廊  ᫨誮 ⮩.
CRC,  ન, 譨 窨, 騥  ᬮ ᯨ᪠
䠩.

 祢   "  ,   /㣫
᪮". ,  ⮬   ᠡ᪮ 㯯,
 祭    .

ਬ ⮣,   ० sn ਢ ,  ᪮ 
㬥樨.