Update README.md

Author: robertaboukhalil

README.md

@@ -109,10 +109,10 @@ You can use the sandbox.bio command line environment to share small snippets of
 ![](https://sandbox.bio/assets/screenshots/gists.png)
 
 1. Create a GitHub Gist at https://gist.github.com/
-  [ ] Create a `.md` Markdown file with notes about the commands. Code blocks with language "bash" will be runnable within sandbox.bio
-  [ ] Add data files if relevant. These **files will be available in the sandbox.bio command-line environment at load time**!
-2. Once created, the URL contains the gist ID
-3. All you have to do is go to sandbox.bio/gists/gist_id
+	- [ ] Create a `.md` Markdown file with notes about the commands. Bash code blocks are runnable within sandbox.bio
+	- [ ] Add data files if relevant. These **files will be available in the sandbox.bio command-line environment at load time**!
+2. Once created, the URL contains the gist ID, e.g. gist.github.com/gists/username/gist_id
+3. All you have to do is go to sandbox.bio/gists/gist_id (no need for the username, just the gist ID)
 
 sandbox.bio will render the Markdown file(s) from the Gist, show code blocks with syntax highlighting, and allow users to run the code blocks in their sandbox.bio terminal environment, where data files will be ready for them.