Merge pull request progit#1677 from bkline/tracked-files

Fix descriptions of untracked files

Merge pull request progit#1676 from bkline/linux-kernel-history

Merge pull request progit#1689 from knittl/help-irc-liberachat

Point readers to Libera Chat IRC

Merge pull request progit#1687 from HonkingGoose/migrate-to-forms

Merge pull request progit#1679 from jliljekrantz/patch-1

Correct spelling error

Merge pull request progit#1657 from patricekrakow/warn-about-version

bash.asc | Warn about the version of the source code

Merge pull request progit#1683 from progit/dependabot/bundler/rake-13…

….0.6

Merge pull request progit#1569 from drichardson/fix-curl

Use -L option in curl command to follow redirect

Merge pull request progit#1621 from SergeiKuznetsov/fix-index

Index must be only in pdf

Merge pull request progit#1567 from tiffany-taylor/master

Small rewording change inside Rewriting History