Expand contributor acknowledgements from git history

Add the contributors that show up in 'git log' to the existing
acknowledgements list in README.rst (which is included verbatim into
chapter 1). Each entry uses the contributor's name where they signed
commits with one, and their GitHub handle otherwise; no email
addresses are included.

Tidy-ups picked up while rebuilding the docs:

- conf.py: relax highlight_language from 'python3' to 'default' so
  Sphinx silently falls back to plain text on snippets that aren't
  valid Python (the python3 lexer was warning on URLs/HTML in
  unlabeled literal blocks).
- Resolve duplicate auto-section-label warnings by renaming
  chapter-16's 'Prerequisites' subsection (now 'Altcha
  prerequisites') and removing a redundant explicit label in
  chapter-14.

Author: mdipierro

README.rst

@@ -222,4 +222,74 @@ Many thanks to everyone who has contributed to the project, and especially:
 - `valq7711 <https://github.com/valq7711>`__
 - `Kevin Keller <https://github.com/Kkeller83>`__
 - `Krzysztof Socha <https://github.com/kszys>`__
-- Sam de Alfaro sam@dealfaro.com (logo design)
+- Sam de Alfaro (logo design)
+
+…and many more contributors who have shipped code, docs, examples,
+translations and bug reports — listed here in alphabetical order:
+
+- a22375
+- A3
+- Alan Etkin
+- Alexandr Karbivnichiy
+- Alexandre Miguel de Andrade Souza
+- Alexei Vinidiktov
+- Alex Bsk
+- Andrew Gavgavian
+- Andrew Rogers
+- Andrew Zhu
+- `anonymous378 <https://github.com/anonymous378>`__
+- Anthon van der Neut
+- Aubrey Moore
+- Auden RovelleQuartz
+- `CarlosDB <https://github.com/cdb88>`__
+- Carlos Lopez Molina
+- chbdetta
+- `ch-rigu <https://github.com/ch-rigu>`__
+- Christian
+- d3im
+- `Daniel <https://github.com/dantoac>`__
+- `DavidiBeMe <https://github.com/DavidiBeMe>`__
+- dkawasaka
+- Donald McClymont
+- DRoc101
+- Eddiedigits
+- Eric Lofstad
+- `Gabriel <https://github.com/Friendly-Banana>`__
+- Giovanni Barillari
+- Hadi Zarkoob
+- `houdinihound <https://github.com/houdinihound>`__
+- hpdumm
+- Igor MSK
+- Iuri Guilherme
+- Jacinto Parga
+- `jarrodwilcox <https://github.com/jarrodwilcox>`__
+- Jerry Wu
+- John Beresford
+- `jonathanclark <https://github.com/jonathanclark>`__
+- kevinkosterr
+- Laurin Schmidt
+- ls1luke
+- luphord
+- Manuele Pesenti
+- marvin4ward
+- `Massimiliano Belletti <https://github.com/mbelletti>`__
+- mau86
+- Maxim N. Kostrikin
+- Mirko Galimberti
+- mrworm
+- Nathan MacNeil
+- Nico de Groot
+- `Olivier Fambon <https://github.com/fambon>`__
+- Paolo Caruccio
+- `Paolo Pastori <https://github.com/paolopas>`__
+- pepej
+- Peter Marelas
+- `Remco Boerma <https://github.com/remcoboerma>`__
+- `Sukhichev <https://github.com/Sukhichev>`__
+- Tolga Konik
+- Wanderson Reis
+- Wasim Baig
+- Ywenzeng
+
+If you see your name missing or wrongly listed here, please open a
+pull request — we're happy to fix it.

docs/chapter-14.rst

@@ -512,8 +512,6 @@ rendered as-is, which avoids the dictionary indirection:
    grid = Grid(..., pre_action_buttons=pre_action_buttons)
 
 
-.. _Using callable parameters:
-
 Using callable parameters
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 

docs/chapter-16.rst

@@ -881,8 +881,8 @@ Adding a Captcha Solution with Altcha
 This section provides a simple captcha implementation for your py4web applications using the **Altcha** library. While not exhaustively tested, it serves as a practical example for integrating a robust, client-side captcha solution.
 More information in https://altcha.org
 
-Prerequisites
-~~~~~~~~~~~~~
+Altcha prerequisites
+~~~~~~~~~~~~~~~~~~~~
 
 First, you need to install the Altcha library. You can do this using pip:
 

docs/conf.py

@@ -64,9 +64,10 @@
 # Default Pygments lexer used for unlabeled literal blocks (``::`` and
 # ``.. code::`` without an explicit language).  Explicitly tagged blocks
 # (``.. code:: bash``, ``.. code:: html`` etc.) still use their own lexer.
-# 'python3' falls back gracefully to plain text for snippets that aren't
-# valid Python, so it's a safe default for this manual.
-highlight_language = "python3"
+# 'default' is Sphinx's Python lexer that silently falls back to plain
+# text for snippets that aren't valid Python, so it's a safe default for
+# this manual.
+highlight_language = "default"
 
 # Pygments style used by both HTML and PDF builds. Friendly contrasts well
 # in print and stays readable on the RTD theme on screen.