Mention that the C locale is an exception on group separators.
Rewrite a "It is thus recommended to use" - which is garblage induced
by addiction to passive voice ("We recommend use of ..." would be
better) - to actually say what needs to be said.
Actually say what the standard and scientific notations are, explain
which parts are locale-dependent, \sa some relevant QLocale docs (from
which the other relevant docs are easily reached).
Rephrase the explanations for validate()'s returns. Address validity
of the string before constraints on the value it wouldn't represent if
it weren't valid.
Change-Id: I5e677f00e5146a44eea5b08c5e0146cd235b95b1
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
554842766f