Fix lots of warnings in docs/Examples that crash

Fix some examples that crash.

Doesn't get all the warnings, but a significant fraction.  (Let's automate the doc build! :+1:)
"The former is the 'open-close-high-low' order of quotes used previously in this module, and the latter is the 'open-high-low-close' order that is standard in finance."
That alternative version of the sentence fixes several little errors.