1440--80's  
1440--'80s  
1440---'80s  
1960s  
1960's  
one two '60s  
'60s

"Isn't this fun"? --- she said...  
"'Quoted' words in a larger quote."  
"quoted" text and **bold "quoted" text**  
'quoted' text and **bold 'quoted' text**  
em-dashes (---) and ellipes (...)  
"[Link](http://example.com)" --- she said.

--- -- ---

Escaped \-- ndash  
Escaped ellipsis\...