Convert the shell command used in emacs init-file into its normal version.

[Hongyi Zhao]

I found the following command from
<https://github.com/jethrokuan/mathpix.el/blob/02016ca4aee9ffce32e730372f45de35c00a3657/mathpix.el#L49>:

"curl -s https://api.mathpix.com/v3/latex -X POST -H \"app_id: %s\" -H
\"app_key: %s\" -H \"Content-Type: application/json\" --data
\"{\\\"src\\\":\\\"%s\\\",\\\"formats\\\":
[\\\"latex_styled\\\"],\\\"format_options\\\":{\\\"latex_styled\\\":
{\\\"transforms\\\": [\\\"rm_spaces\\\"]}}}\""

I want to obtain its normal version and test it under the system's
shell terminal. Any hints for deleting the escape characters correctly
from the above command in Emacs way?

Regards
-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
NO. 552 North Gangtie Road, Xingtai, China