Convert all spelling to Google English

[joepetrowski]

Fixes #1768

The only remaining thing to change is a crate in libp2p called behaviour.

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[shawntabrizi]

Ran a script across all the files and found these too. You should be able to cherry pick commits if you don't like any of the changes I introduced

Still missing:

• behaviour to behavior
• colour to color

Due to downstream dependencies

[joepetrowski]

Councillor is still used more in US English.

Same with marshal

cancelled/canceled is basically a tie

That's why I didn't do those three. Good catches on the others, I will handle rollback and update.

[joepetrowski]

My search for colour comes up empty, where do you see it? Behaviour I mentioned in my comment, will need to update libp2p.

parity@eta ~/p/s/substrate> grep -rnIe 'colour'
parity@eta ~/p/s/substrate> 

[gavofyork]

Indeed. Some of those changes will need rolling back.

We use:

• Councillor (https://english.stackexchange.com/questions/350196/councilor-vs-councillor)
• Cancellation ("cancelation" is plain wrong, even in the US: https://www.grammarly.com/blog/canceled-vs-cancelled/)

I would basically go with the most common spelling on google for everything. "Google English".

[gavofyork]

Otherwise, it looks good.

[shawntabrizi]

@joepetrowski you can find Colour in two files:
https://github.com/paritytech/substrate/blob/master/core/cli/src/informant.rs#L19
https://github.com/paritytech/substrate/blob/master/core/cli/src/lib.rs#L714

Again, these are part of an external crate, so not much we can do, but just an FYI

[tomusdrw]

However, we don't support aliases for subscription names, so this has to use the new name despite being subscribed via alias.