Copying a snippet into HTML is where a documented language stops being the real one. Each block on the page is a program here with its recorded output beside it, and check.sh is what says the page is still true after a change.
Description
Languages
OCaml
67.2%
Emacs Lisp
15.2%
C
10.4%
HTML
2.9%
Standard ML
2.8%
Other
1.5%