From the mdformat's documentation page:
"Mdformat is an opinionated Markdown formatter that can be used to enforce a consistent style in Markdown files. Mdformat is a Unix-style command-line tool as well as a Python library."
The rationale for using mdformat is the same as the one for using black <black-discussion> which is to avoid spending any time thinking about the formatting of source files.
Examples of choices that mdformat will make:
# Hello world
Here is how to write some python code:
print("Hello Nashpy!)become:
# Hello world
Here is how to write some python code:
```
print("Hello Nashpy!)
```