[Checkins] [zopefoundation/Zope] 196120: Improve readability of the ZCatalog documentation ...

[Jürgen Gmach]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/Zope
  Commit: 1961208d11b8bf07706f017b419e5e0960543285
      https://github.com/zopefoundation/Zope/commit/1961208d11b8bf07706f017b419e5e0960543285
  Author: Jürgen Gmach <juergen.gmach at googlemail.com>
  Date:   2019-12-12 (Thu, 12 Dec 2019)

  Changed paths:
    M docs/zopebook/SearchingZCatalog.rst

  Log Message:
  -----------
  Improve readability of the ZCatalog documentation (#741)

- improved formatting
- cleaned up code examples a bit
- fixed many typos
- deleted references to arcane Zope versions
- deleted references to both TextIndexNG3 and FieldedTextIndex