Understanding "help" command description syntax - explanation needed

[Chris Angelico]

On Wed, Nov 5, 2014 at 11:31 PM, Ivan Evstegneev
<webmailgroups at gmail.com> wrote:
>>> That's what I'm talking about (asking actually), where do you know it from?
>
>>>I know it because I've been a programmer for 39 years.
>
> I didn't intend to offence anyone here. Just asked a questions ^_^

Don't worry about offending people. Even if you do annoy one or two,
there'll be plenty of us who know to be patient :) And I don't think
Larry was actually offended; it's just that some questions don't
really have easy answers - imagine someone asking a great
mathematician "But how do you KNOW that 2 + 2 is 4? Where's it written
down?"... all he can say is "It is".

ChrisA