I would just like to give a shout out to Scrivener’s handling of dashes, particularly the M dash, and quotations. The last word processor I used did not do M dashes well at all and the last several didn’t seem to understand that end quotes could come after a dash of any kind. Having to paste in an M dash or put a dummy letter after a dash just to get the quotes the right way was very annoying and disruptive to my writing. Scrivener, on the other hand, automatically makes an M dash from a double dash and has no problem with end quotes following a dash. This greatly improves my writing efficiency and I really, really appreciate it.
THANK YOU!! 
That is unfortunately a common flaw with “smart” punctuation—in fact the Mac version of Scrivener has that flaw (well, it’s more accurate to say the Mac has that flaw and thus all software on the Mac that supports typographic punctuation will have the problem too).