After starting to use the siunitx package for typesetting units (and the numerals before the units) in LaTeX, I noticed that it typesets a single space between a numeral and a unit (a space that is ...
Possible Duplicate: When is it appropriate to use non-breaking spaces? If I am writing "I ran X distance", should I leave a space between the value and abbreviated distance, or is it more ...
Should there be a space before a percent sign or not? Should you write 20% or 20 %? I'm not sure if there is any consensus about this or not. Is one way more common than the other?