[algorithms.general]
Change: Result state of inputs after application of some algorithms
Rationale: Required by new feature.
Effect on original feature:
A valid C++ 2003 program may detect that an object with a valid but
unspecified state has a different valid but unspecified state with this
International Standard. For example, std::remove and
std::remove_if may leave the tail of the input sequence with a
different set of values than previously.