Missing paragraph number for Preconditions element [span.cons] p7/8

[Dani-Hub]

[span.cons] before p8 has a Preconditions element without own paragraph number:

7 Constraints: Let U be remove_reference_t<iter_reference_t>.
(7.1) — is_convertible_v<U()[], element_type()[]> is true. [Note: The intent is to allow only
qualification conversions of the iterator reference type to element_type. —end note]
(7.2) — It satisfies contiguous_iterator.
(7.3) — End satisfies sized_sentinel_for.
(7.4) — is_convertible_v<End, size_t> is false.
Preconditions:
(7.5) — If extent is not equal to dynamic_extent, then last - first is equal to extent.
(7.6) — [first, last) is a valid range.
(7.7) — It models contiguous_iterator.
(7.8) — End models sized_sentinel_for.

The Preconditions element should get a separate paragraph number (8), similarly the current bullets (7.5)-(7.8) need to be incremented accordingly

[jwakely]

Thanks!