String escaping in windows and Non-Windows shells

[Loicniragire]

Suppose the following Post is intended:

http://something.com
Content-Type: application/x-www.form-urlencoded
POST /identity/token
grant_type=password
username=Joe
password=hello

Option 1:
Set vrc_split_request_body = 1 in your vimrc - the above request would work but subsequent requests will also be split. Not necessarily a desired effect.

Option 2:
Do not set vrc_split_request_body to 1 in your vimrc but instead issue the following body:
grant_type=password&username=Joe&password=hello
Technically this should work except, on windows at least, the above request body is escaped as follow:
grant_type=password&username=Joe&password=hello

(I traced this escaping effect to ftplugin\rest.vim - function Shellescape(val))

As a temporarily solution, bypassing Shellescape function seems to work for option 2.