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

Merge pull request progit#1599 from bagasme/update-git-credential-ro-…

…usage

Update usage snippet and code explanation for git credential-read-only

Merge pull request progit#1672 from slonopotamus/kindlegen

resolves progit#1671 install Kindlegen so .mobi output can be produced

Merge pull request progit#1626 from HonkingGoose/chore/update-link-in…

…-readme

Merge pull request progit#1669 from HonkingGoose/migrate-to-main

Migrate from master to main

Merge pull request progit#1668 from progit/ben/travis-cleanup

Travis cleanup