inform-docs 6.31.1+dfsg-2 (armhf binary) in ubuntu bionic

 Inform is an object-oriented language for text adventure games which
 are commonly known as "interactive fiction". The story files are
 compiled into a special form of bytecode (Z-code) which can then
 be run by Z-code interpreters that exist for a multitude of
 operating systems.
 .
 This package contains:
  * the Inform Designer's Manual (4th edition)
  * the Inform Beginner's Guide