Editorial change missing from resolution DR739: update note to reflect
that plain bit-fields are signed exactly when their underlying type is
signed.
[basic.stc.dynamic] Fix an error that was introduced editorially:
the implicitly-declared 'operator delete' functions are explicitly
'noexcept'.
[temp.expl.spec] Clarify contexts in which locations of partial and
explicit specialization are relevant.
[dcl.init.list] Correct typo "orresponding".