To enable automatic compilation of books, please fix failing URLs

[jnavila]

See:
https://github.com/progit/progit2-zh/runs/3206952351

[networm]

It seems that checker couldn't visit sublimemerge.com

1m 31s
Run bundle exec rake book:build_action
bundle exec rake book:build_action
shell: /usr/bin/bash -e {0}
Generating contributors list

Converting to HTML...

-- HTML output at progit.html
-- Validate HTML file progit.html
NOTE: nokogumbo: Using Nokogiri::HTML5 provided by Nokogiri. See sparklemotion/nokogiri#2205 for more information.

• progit.html
  • External link https://www.sublimemerge.com/) failed: 404 No error

https://github.com/progit/progit2-zh/runs/3814348069

[jnavila]

For some reason, the parenthesis is part of the URL. Please add a space before it.