Revision control

++ # R23 (skill-language-style): example/tutorial titles shouldn't repeat the
++ # word "Example" -- the page is already filed under Examples. Reuses the
++ # heading.h1 scope Qt already binds \title to (see Qt.Language.QDocPageTitle).
++ extends: existence
++ message: "Title repeats '%s'; the page is already an example (see R23)."
++ link: https://wiki.qt.io/Writing_Example_Documentation_and_Tutorials
++ level: suggestion
++ scope: heading.h1
++ ignorecase: true
++ tokens:
++ - 'Example'