tilde-fenced code blocks rendered as strikethrough

[azrdev]

Writing markdown, I frequently use tilde ~ instead of backticks ` to fence code blocks:

text

~~~python
# some code 
~~~

However, vim-markdown (currently on master@ b4dc23e ) renders these not as code but strike-through text, since I'm also using let g:vim_markdown_strikethrough = 1. When disabling that option, the tilde-fenced code blocks are correctly recognized as such.