gui/camelot: Replace ads with warnings
Remove ads only
Missing whitespace
scenarios/ci: Github ▶︎ GitHub
Lets ▶︎ Let's (where appropriate)
OSX ▶︎ OS X

Also removed “Mac”, as the official name was officially shortened to “OS X” a few releases ago.
Update conf.py

Updated the copyright year for the ePub output/metadata (epub_copyright).
Added search.html to epub_exclude_files

Added search.html to epub_exclude_files to avoid these errors:

Epubcheck Version 3.0

Validating against EPUB version 2.0
ERROR: pythonguide.epub/search.html(17,57): attribute "id" not allowed here; expected attribute "charset", "defer", "src" or "xml:space"
ERROR: pythonguide.epub/search.html(51,32): element "form" not allowed anywhere; expected the element end-tag, text or element "a", "abbr", "acronym", "address", "applet", "b", "bdo", "big", "blockquote", "br", "cite", "code", "del", "dfn", "div", "dl", "em", "h1", "h2", "h3", "h4", "h5", "h6", "hr", "i", "iframe", "img", "ins", "kbd", "map", "noscript", "ns:svg", "object", "ol", "p", "pre", "q", "samp", "script", "small", "span", "strong", "sub", "sup", "table", "tt", "ul" or "var" (with xmlns:ns="http://www.w3.org/2000/svg")
ERROR: pythonguide.epub/search.html(54,66): element "form" not allowed anywhere; expected the element end-tag, text or element "a", "abbr", "acronym", "address", "applet", "b", "bdo", "big", "blockquote", "br", "cite", "code", "del", "dfn", "div", "dl", "em", "h1", "h2", "h3", "h4", "h5", "h6", "hr", "i", "iframe", "img", "ins", "kbd", "map", "noscript", "ns:svg", "object", "ol", "p", "pre", "q", "samp", "script", "small", "span", "strong", "sub", "sup", "table", "tt", "ul" or "var" (with xmlns:ns="http://www.w3.org/2000/svg")

It should be noted that ePub does not use javascript for anything (or any scripting), so all those other pages with the quick search function do bad things to ePub files.  I'll send through the rest of the errors in a separate issue.
Merge pull request #411 from Hasimir/patch-1

Update conf.py
Add book - Writing Idiomatic Python
Add book link
Fix typo: "Stye" --> "Style"
Wrap text
freezing.rst: Fix heading’s hyphen length
Mark up command line options
Mark up files (…that I missed earlier…)
Mark up environment variables
Merge pull request #415 from kuyan/patch-1

Fix typo: "Stye" --> "Style"
Merge pull request #409 from Zearin/text

Minor text fixes
Rename title, add links for 2.7.3 and 3.3