Hyphenate "pointer sized" for isize/usize in Primitive Types in Language Reference

[matthewwiese]

The description for isize and usize in the Primitive Types section of the Language Reference does not correctly hyphenate "pointer sized," which can cause a newbie to misread and potentially think they are pointer types, instead of pointer-sized integers.

This is an example of a compound adjective. The Rust documentation for isize and usize correctly hyphenate pointer-sized, for instance.

[nektro]

usize actually isnt a shortening for pointer sized and you can see more on the discussion in #5185

[andrewrk]

please open a pull request for such trivial suggestions, rather than an issue