The deduction guides for unordered_map and unordered_multimap use an exposition-only helper that does not exist

[villevoutilainen]

This is a simple typo fix from iter_value_t to iter_val_t.

In [unord.map.overview], edit as follows:

template<class InputIterator,
class Hash = hash<iter_key_t>,
class Pred = equal_to<iter_key_t>,
class Allocator = allocator<iter_to_alloc_t>>
unordered_map(InputIterator, InputIterator, typename see below
::size_type = see below ,
Hash = Hash(), Pred = Pred(), Allocator = Allocator())
-> unordered_map<iter_key_t,
iter_value_t, Hash, Pred,
Allocator>;

In [unord.multimap.overview], edit as follows:

template<class InputIterator,
class Hash = hash<iter_key_t>,
class Pred = equal_to<iter_key_t>,
class Allocator = allocator<iter_to_alloc_t>>
unordered_multimap(InputIterator, InputIterator,
typename see below ::size_type = see below ,
Hash = Hash(), Pred = Pred(), Allocator = Allocator())
-> unordered_multimap<iter_key_t,
iter_value_t, Hash, Pred,
Allocator>;

[villevoutilainen]

Note that the LWG issue list maintainer thought this to be editorial. The changes are in normative text, but the typo fix seems obvious enough that this might be doable editorially.