[linalg.reqs.val] is missing an 's' in "linear algebra value type"

[jwakely]

Throughout 29.9, the following types are linear algebra value type:

The incoming paper (P1673R13) said "linear algebra value types" here, plural. The 's' has been lost as a consequence of the defnadjx macro:

\pnum
Throughout \ref{linalg},
the following types are
\defnadjx{linear algebra}{value type}{linear algebra value types}:

I'm not sure how to fix that without altering the index entries ... although they seem kinda messed up anyway:

@jensmaurer what was the intention here?

[jwakely]

Should it be: \defnadjx{linear algebra}{value types}{value type}:?

[jensmaurer]

We want the singular index entry and the plural display in the running text. Looks like I messed up the use of the macro.

[tkoeppe]

Feel free to just push the change!

[jwakely]

#7374