Maps the given name of a gzip-compressed file to the name that the
file should have after uncompression. Commonly used file type specific
suffixes like ".tgz" or ".svgz" are automatically detected and
correctly mapped. For example the name "package.tgz" is mapped to
"package.tar". And any file names with the generic ".gz" suffix
(or any other generic gzip suffix) is mapped to a name without that
suffix. If no gzip suffix is detected, then the file name is returned
Maps the given file name to the name that the file should have after
compression with gzip. Common file types with custom suffixes for
compressed versions are automatically detected and correctly mapped.
For example the name "package.tar" is mapped to "package.tgz". If no
custom mapping is applicable, then the default ".gz" suffix is appended
to the file name.