fix: use -- separator when passing file paths to decompression tools

[luinbytes]

Summary

Fixes #3222 - Files with dash-prefixed names (e.g., -10.txt.gz) were causing decompression tools to fail with errors like gzip: invalid option -- '0' when using the -z flag.

The Problem

When searching compressed files with -z, ripgrep spawns external decompression tools (gzip, bzip2, xz, etc.) and passes the file path as an argument:

gzip -d -c ./-10.txt.gz

This fails because gzip interprets -10.txt.gz as options, not a filename.

The Fix

Added -- separator before the file path to signal end of options:

gzip -d -c -- ./-10.txt.gz

Testing

Verified locally:

$ echo "test content" > ./-10.txt
$ gzip ./-10.txt
$ rg -z test .
./-10.txt.gz:test content

Changes

• crates/cli/src/decompress.rs: Single line change to add -- separator

This is a minimal, safe fix that follows standard POSIX conventions for handling dash-prefixed filenames.

[luinbytes]

Hi! Friendly bump on this. Happy to make changes if anything needs adjusting. No rush, just checking it hasn't been missed. Thanks!

[jafd]

Prior art: #3224