Wherefore Markdown?

This is a test.

Here's—an emdash—test.

While this–is an endash–test. 

One day James said "I would like to be double-quoted," while Max replied 'I prefer single quotes'. 

Max's apostrophes showed up equally badly as James's. 

Will this article end abruptly or fade away...

Two--dashes in a row vs. three---dashes vs. one-dash.