Misc changes from Myron

* Use consistent style for code snippets
* Fix typo
* Greatly expand history.

The history could use some feedback, particularly from @dchelimsky.  Is it accurate?  Did I cover the important things?

/cc @JonRowe 
I didn't intend for this to be a line break in the HTML..these were originally separate paragraphs and then I joined them into one.  I'll reformat it a bit so it doesn't look odd in the source, though.