deletions | additions       diff --git a/This_is_supposed_to_be__.md b/This_is_supposed_to_be__.md  index 3736b8f..9f39ec8 100644  --- a/This_is_supposed_to_be__.md  +++ b/This_is_supposed_to_be__.md 
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the real question is whether this is usable.  \( u↦v\)  Here it is without math environment:  u↦v ## this is h2  I'm just wondering about the Markdown syntax highlighting  ### this is h3  > and this is a blockquote, which I already know