This is a great idea and I commend it and I hope others find it useful. However, I have a rather narrow use-case for GitHub searches, and in my initial experime

This is a great idea and I commend it and I hope others find it useful. However, I have a rather narrow use-case for GitHub searches, and in my initial experiments, this tool comes up 100% empty on common searches I use every day for work. Most of my GitHub searches don't actually revolve around actual code-code. I search for text strings in prose that turn up in code searches. So the file types may be text or MarkDown instead. Perhaps grep.app only indexes and presents actual code-code and filters out all the prose I'd be interested in. Sad, because there are actually a few instances where my searches involve code with many intricate special characters, and GitHub's current code search ignores all those.