fix typos in comments and tests

[ccoVeille]

Summary

fix typos in documentation, comments and tests

Motivation

I looked at the documentation, then found one typo in Panic: "functon" instead of "function"

So decided to check a bit further.

Changes

I used the following tools to validate the typos:

• https://github.com/crate-ci/typos
• https://github.com/streetsidesoftware/cspell-cli
• https://github.com/codespell-project/codespell

I applied automatic fixes, then reviewed them manually one by one, before committing and opening this PR

Related issues

None

[ccoVeille]

Just finding back this old PR. Is there anything else needed ?

[alexandear]

@ccoVeille could you please fix conflicts?

[ccoVeille]

I will

[ccoVeille]

Almost everything I reported in the initial MR were fixed by @alexandear via https://github.com/stretchr/testify/pull/1410

The changes remaining are very light, there are less important than when I reported the MR initially

It's up to you to merge or close

[brackendawson]

TIL behaviour is en-GB, we've got some more of those now in our issue templates. I believe we use en-US here. Can you give this a rebase and another search then I will gladly merge.

[ccoVeille]

here we are, I have just rebased and apply another round of modifications