progit / progit2

This allows to add the final period.

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

This is an indirect way of checking the structure of the book, the
asciidoc syntax and the external links.

Line 229 formatting error by * (asterisk) fixed

Asciidoctor documentation suggests solution to properly render
a possessive monospaced phrase by using unconstrained formatting.
However, this approach does not work when one more monospaced phrase
follows in the same paragraph.
The simplest workaround was suggested by the Asciidoctor project lead:
Dan Allen.

Escape tilde to fix HEAD~~~ presented as HEAD~

`git restore` introduced  in v2.23.0

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

….0.12

Update asciidoctor requirement from 2.0.11 to 2.0.12

Updates the requirements on [asciidoctor](https://github.com/asciidoctor/asciidoctor) to permit the latest version.
- [Release notes](https://github.com/asciidoctor/asciidoctor/releases)
- [Changelog](https://github.com/asciidoctor/asciidoctor/blob/master/CHANGELOG.adoc)
- [Commits](asciidoctor/asciidoctor@v2.0.11...v2.0.12)

Signed-off-by: dependabot[bot] <support@github.com>

Stop adding negative leveloffset for EPUB

asciidoctor-epub3 1.5.0-alpha-14 now handles whole book as a single document.

Negative leveloffset
1. Breaks appendix because appendix subsections are not allowed to be higher that level 3. When leveloffset is applied to them, they become level 2 and are no longer children of appendix and instead become standalone chapters
2. Transforms progit into a multi-part book instead of multi-chapter book, what is wrong

After removal of negative offset, epub is structurally equivalent to other formats.

Migrate to Asciidoctor 2.0.11

- Bump Asciidoctor from 1.5.6.2 to 2.0.11
- Change style to new specifications.
- Pin dependencies
- Fix unintended highlighting of text
- Undo rake script on Markdown file
- Undo rake script on Ruby file

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

Co-authored-by: Ben Straub <ben@straub.cc>

Co-authored-by: Ben Straub <ben@straub.cc>

Fix typo in section 2.4

Removed the erroneous --add parameter from the example core.editor config used for TextEdit.

Fix warning about `git restore` command

Add tip to point to the official GitHub CLI tool

The GitHub CLI lets you do your GitHub work from within the command line.
GitHub has just released version 1.0, and so we can "recommend" it to our readers.