* Fixes a couple of grammar mistakes in AUTHORS.md
* Grammar fix in CONTRIBUTING.md
* Fixes multiple grammar errors in DEVELOPERS.md
* Caps the character length in a edit I made.
* restore tabs size to 8 chars
* fixes clang-format-diff for function declaration
* DEVELOPERS: explain pre-commit hook
* sys/pre-commit: do not consider unstaged changes
* sys/pre-commit: change doc
* create an example in doc
* suggest --no-verify