[func.bind.isbind]/2 says "have a BaseCharacteristics"

Reported by Stephan T. Lavavej.

Closes #259.
[pointer.traits.functions] Add paragraph numbers.

Reported by Stephan T. Lavavej. Closes #258.
[util.smartptr.shared.const]/33 Add whitespace

Reported by Stephan T. Lavavej. Closes #249.