Duplicate `curl` commands in use-case markdown files to cover both Linux and Windows

[patricekrakow]

In order to support both Linux (Mac) and Windows users, I think we should duplicate our curl commands so both types of users can just copy-paste the curl commands in our documentation and run them directly on their respective computers.
The relevant differences are:

• Single-quote, such as 'http://...', for Linux should be changed into double-quote, such as "http://...", for Windows
• Escape character for line continuation is a non-quoted backslash - \ - for Linux, while it is a caret - ^ - for Windows.

I would suggest the following "format", as, according to my knowledge, the GitHub rendering of markdown does not have a native support of tabs:

LINUX

curl --request POST \
  --url 'http://localhost:3030/tokens' \
  --user 'public-36297346:private-ce2d3cf4' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data 'grant_type=client_credentials'

WINDOWS

curl --request POST ^
  --url "http://localhost:3030/tokens" ^
  --user "public-36297346:private-ce2d3cf4" ^
  --header "Content-Type: application/x-www-form-urlencoded" ^
  --data "grant_type=client_credentials"

What do you think?

[larsolofsson]

Curl --request POST can not be run with Windows CMD, if --data is Json instance.