One space or two (according to WaPo)

This debate does not exist in French (which has rather rigid typographic rules): only one space.

That's all.

http://chiclassiccomp.org/docs/content/books/Computing/OperatingSystems/TheMacNotTypewriter_RobinWilliams.pdf

A fun read  for the one space vs two conversation : )

It's worth noting that all of the testing they did utilized a monospaced font (like at typewriter, which does need two spaces). The one-space-after-a-period standard was created for variable width fonts.

The results of the testing may have been different if they had tested with those.

(I grew up with typewriters and using two spaces, but I have adapted to the digital age, and now use only one. I also actively remove the double-spacing from any text I receive)

99% of my/our development is for online presentation. I actively remove double-spaces if I catch them on submit. We have copy-editors at the office for a lot of stuff, I need to check what their official policy is. IMO, for online text, double-spacing after the end of a sentence is outdated and pointless, and I just don't like the look of it.

After typing up a lengthy book chapter for a doctor who never took a typing class, he informed me that 1 space was normal and that 2 spaces were typos.   I explained that real typists were all taught to use 2 spaces between sentences thus my work was correct and did not contain typos. 

Behind my back, he did a global find & replace to remove all my double spaces.  A few days later, the book publisher called and said he should have used double spaces so he reluctantly put them back .