vlna version (return code: 0)
This is program vlna, version 1.5, (c) 1995, 2002, 2009, 2010 Petr Olsak
vlna: cannot open file version
vlna --help (return code: 3)
usage: vlna [opt] [filenames]
opt -f : filter mode: file1 file2 ... file1->file2
file1 ... file1->stdout
... stdin->stdout
nofilter: file1 [file2 file3 ...] all are in/out
-s : silent: no messages to stderr
-r : rmbackup: if nofilter, removes temporary files
-v charset : set of lettres to add tie, default: KkSsVvZzOoUuAI
-x code : code for tie symbol, default: 7E, example -x C2A0
-m : nomath: ignores math modes
-n : noverb: ignores verbatim modes
-l : LaTeX mode
-w : web mode