Somewhere in the miasma of bandwidth-wasting childish prattle, someone might have answered this, but I'll go anyway.

Back in the day when print press type was set by hand, it was difficult to keep track of certain things--partly because the type was set backward. It was, for instance, difficult to distinguish between "p" an "q" when viewed backward, hence the phrase, Mind your p's and q's.

Likewise, it was difficult to discern the beginning and end of sentences, further compounded by limited font availability. Editors, too, who spent/spend all day reading/correcting manuscripts found them difficult to read after a while, so easy-to-read manuscripts received preferential treatment. Thus, doubles-spaced sentences and paragraphs became the standard.

Today, with desktop publishing and automatic text justification, extra spaces are unnecessary and actually counter productive. So, if banging out something on a typewriter, two spaces. In a word processor, one space.

(Full disclosure: I am the editor of a print magazine as well as a book author.)

Why the parent is modded "Offtopic" is beyond me. TI's draconian attempt to control what consumers do with, to, or on property that they purchased and own is reprehensible.

So, fuck you TI, indeed.

print "Hello World!"
end

REM And even "end" is optional.

The human urethra imparts a spiral/twist to the urine stream to make it, well, stream instead of dribbling. MythBusters failed to recognize/account for this in the original tests. (Actually, they fail in fundamental things like this rather often.)

Wrong. Voltage in overhead power transmission lines (at least in the U.S.) is 7200 volts minimum per line. A single overhead line is 7200 volts, and a pair is 14,400 (180-degree phase). Even if the urine steam is broken into a series of droplets, 7200 is sufficient voltage to arc between droplets, and obviously enough current to melt you Indiana Jones-Nazi style.
     

...if a handful of AOL users flag your email as spam, AOL will not whitelist your server. This includes double-opt in email sent to verify registration for a newsletter or service. I swear to Bob, AOL use will mark these as spam then complain because they cannot register for your site.

We now simply tell potential registrants who enter an AOL address, "Sorry, get a real email service then we will talk."

No, the summary used it exactly as the OP stated, and said use was incorrect. Pulling a lame justification out of your ass doesn't change that.