I learned to touch type in an actual course in high school (do they still have those?), so I was taught to use two spaces after a sentence, even though the rule was probably already obsolete by the time I learned it. So of course, that has stuck with me through the years, and like the OP, I still tend to use the two spaces at the end.
To be honest, I do actually prefer the visual break of two spaces at the end, versus the one. Even reading on this board, there's not enough visual distinction between sentences vs. between words, so long paragraphs can be tiring. Granted, my eyes aren't the greatest, so it may be less of an issue for people with more normal vision.
If your website renders pages in HTML, then it doesn't really matter how many how many spaces you put at the and of a sentence (or between words, for that matter), it will always only render as one space. Although I believe you can circumvent that by using (ampersand)nbsp(semicolon).
Like this forum, for instance. I double-spaced every sentence in this paragraph, but not the previous one. You can check in the composing box if you quote it.
It doesn't really work like that, sorry. It will quote how it was rendered, not how you originally entered it, so when I quote your paragraph, I still only see one space after each period.
Ah, that explains why I have to correct random double spacing on wiki pages. Waste of space.
I know what you mean in context, but double spacing usually refers to leaving an extra blank line between lines, doesn't it? And one extra character for each sentence hardly seems like a significant waste.
@bdub76 , although this is an interesting topic, I'm afraid it really doesn't have anything to do with Trek Lit. As such, I'm going to move it to Miscellaneous. I hope you don't mind.