Summary of important user-visible changes for pkg-octave-doc 0.8.6:
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 ** A `doc-cache` holds typography as the ASCII it was written in, not as
    HTML entities: `tree&rsquo;s`, `&hellip;` and `&times;` read `tree's`,
    `...` and `x` again, so `lookfor -all` finds text across them.  Rebuild
    the caches to pick it up.

 ** A method in an `@class` folder may be labelled with its class, as a
    classdef member is, without a `CategoryLabel` warning from
    `package_texi2cache`, `function_texi2cache` or `check_texi_docs`.
