tar: trim help text

tar: trim help text

Usage: tar c|x|t [-ZzJjahmvokO] [-f TARFILE] [-C DIR] [-T FILE] [-X FILE] [--exclude PATTERN]... [FILE]...

Create, extract, or list files from a tar file

Operation:  <============== DELETED
    c	Create
    x	Extract
    t	List
    -f FILE	Name of TARFILE ('-' for stdin/out)
    -C DIR	Change to DIR before operation
    -v	Verbose
    -O	Extract to stdout
    -m	Don't restore mtime
    -o	Don't restore user:group
    -k	Don't replace existing files
    -Z	(De)compress using compress
    -z	(De)compress using gzip
    -J	(De)compress using xz
    -j	(De)compress using bzip2
    -a	(De)compress using lzma
    -h	Follow symlinks
    -T FILE	File with names to include
    -X FILE	File with glob patterns to exclude
    --exclude PATTERN	Glob pattern to exclude

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>