phpstorm - Google's robots.txt Tester for googlebot throws error on Disallow: .idea - Stack Overflow
Submitted URL blocked by robots.txt" BUT robots.txt Tester says it is allowed. - Google Search Central Community
seo - Why Google robots.txt Tester has error and it's not valid - Stack Overflow
My Blogger Lab: How to Test your Robots.txt File with Robots.txt tester in Blogger
What Is A Robots.txt File? Best Practices For Robot.txt Syntax - Moz
How to adjust robots.txt file for Google bots
Glenn Gabe on Twitter: "Quick reminder that your robots.txt directives require a user-agent to be specified. If you quickly add a disallow directive w/out it having a user-agent, those urls will not
Bing Webmaster Tools makes it easy to edit and verify your robots.txt | Webmaster Blog