Re: ASCII-only startup message?

[Paul Eggert]

Drew Adams wrote:
> I have never seen any doc or typography guideline that favors
> a quotation mark over an apostrophe for English contractions,
> possessives, or non-word plurals.

Section 6.2 of the Unicode Standard states:

U+2019 right single quotation mark is preferred where the character is to 
represent a punctuation mark, as for contractions: “We’ve been here before.” In 
this latter case, U+2019 is also referred to as a punctuation apostrophe.

http://www.unicode.org/versions/Unicode8.0.0/ch06.pdf