Changelog:

• Fix /T (trim flag) for regex.
• Trim trailing separator.
• Convert system read errors from corrupt ELF files into human readable error messages.
• fix multithreaded decompression file descriptor issue by using close-on-exec.
• Exclude surrogate pairs from utf-8 detection.
• Include # to the list of ignored format chars.

Signed-off-by: Martin Reboredo <yakoyoku@gmail.com>

Check file and MIME type of an AVIF image, the exa executable, the libheif.so shared library and a Zstandard compressed tarball successfully.