Check settings name

[mnojek]

From RF User Guide: " Settings used to be also space-insensitive, but that was deprecated in Robot Framework 3.1 and trying to use something like [T a g s] causes an error in Robot Framework 3.2. Possible spaces between brackets and the name (e.g. [ Tags ]) are still allowed. "

[bhirsz]

There is setting-name-not-in-title-case rule. It will detect [arguments] but not [ Arguments ]. Should we create another rule for extra checks or rather rework setting-name-not-in-title-case (together with rule name change, ie invalid-setting-name)? @mnojek

[bhirsz]

For reference there is section-name-invalid which checks case, spacing and formatting (*** Name ***)

[mnojek]

I think I will keep setting-name-not-in-title-case as it is and add another rule like invalid-setting-name so that we have more precise messages instead of just 'something is wrong with this setting' if the rule is going to match all possible violations.