OpenSHMEM 1.5 Doc Edits

[nspark]

@jdinan Notes on use of the em dash (—):

• Grammar Girl:

  Don't put a space between an em-dash and the adjacent words.

  Every style guide I checked, except the AP Stylebook, stated there should be no spaces between an em-dash and the adjacent words. That means it is a style choice. If you're writing for a newspaper, magazine, or website that uses Associated Press style, put in the spaces. Otherwise, leave them out.

• The Punctuation Guide

  The em dash is typically used without spaces on either side, and that is the style used in this guide. Most newspapers, however, set the em dash off with a single space on each side.

• Grammarly

  Putting spaces before and after an em dash is a matter of preference; just be consistent.

[jdinan]

@nspark Until recently, I used two spaces after a period, so I am happy to follow your lead and remove the extra spaces that I added. :) There is one instance in backmatter.tex that I didn't change. Could you take a look at that one?