Typo and confusion in 4.1.9 intro

[azaroth42]

The following examples illustrate how @import can be used to express a for type-scoped context that loads an imported context and sets @propagate to true and how to make similar modifications.

Propose:

The following examples illustrate how @import can be used to express a type-scoped context that loads an imported context and sets @propagate to true , as a technique for how to make other, similar modifications.