Question: I have a `README.md` in a repository on GitHub that shows a code block of an example `.gitignore`.
I know that one can mark a code block with a language tag in GitHub Flavored Markdown (GFM).
For example, the following would be properly prettified in GFM:

```
json
{
  "json": true
}

```

Also, I know that the definitive list of languages supported by GFM is the [`languages.yml` in the linguist repository](https://github.com/github/linguist/blob/master/lib/linguist/languages.yml).
However, I cannot figure out which of those language tags I should use.

I tried `gitignore` even though it isn’t on the list of supported languages, but it doesn’t get highlighting:

```
gitignore
# Common editor swap files
*.swp
*~
*\#*

```

What tag should I use in this case?

EDIT: I have opened [linguist#4225](https://github.com/github/linguist/issues/4225)

Answer: 
Short answer
============

Google Forms doesn't include a feature to do this.

Explanation
===========

In contrary as occurs with Google Documents, Sheets and Slides, Google Forms doesn't have the revision history feature.

Unfortunately Google Drive doesn't keep revisions of Google Forms either.

Suggested action
================

Send feedback to Google to request to add a feature to prevent the missing of form elements like questions and sections. To do this, open the form on edit mode, then click on ? > Report a problem (bottom right).
You can undo. Go to the top of the page where you hit send. There are three dots. Click on that to find undo!