Fun fun: if you make a shell heredoc to populate a Markdown file, and you put commands in backticks, it will execute the commands! Quote your heredoc marker to prevent chaos...
Bad:
cat > README.md << --end-readme--
Here's a dangerous command: `remove-everything`.
--end-readme--
Good:
cat > README.md << "--end-readme--"
Here's a dangerous command: `remove-everything`.
--end-readme--