UltraCompressor II was a DOS-era archiver created by Nico de Vries between
1992 and 1996.  It was notable for its advanced deduplication system called
"master blocks", file versioning within archives, and competitive compression
ratios on the hardware of its day.

The archiver used an LZ77 sliding-window compressor with Huffman entropy
coding.  The algorithm operates on a 64KB circular buffer with hash-chain
match finding.  Matches of 3 to 32760 bytes are supported, with lazy
evaluation to find better matches at adjacent positions.

Huffman trees are serialized using delta coding against the previous block's
tree, with a nested Huffman code for the delta symbols.  This is remarkably
efficient for typical data where consecutive blocks have similar symbol
distributions.

The deduplication system works by identifying common data blocks across files
and storing them only once as "master blocks".  When a file's compressed data
matches an existing master, only a reference is stored.  This was ahead of its
time -- modern tools like borg and restic use similar content-defined chunking.

UC2 v3.0.0 is a cross-platform revival of this archiver, built on Jan
Bobrowski's clean-room portable decompressor (libunuc2).  The project brings
UC2 back as a modern, portable C99 tool that runs on Linux, macOS, Windows,
and even DOS via DJGPP cross-compilation.

This text file serves as part of the test corpus for verifying the extraction
pipeline.  It contains enough English prose to exercise the typical symbol
distribution paths in the decompressor, including the Huffman tree generation
and the LZ77 back-reference matching for repeated phrases like "master blocks"
and "compression" which appear multiple times.
