Redaction: Moroni is creating a literary formula for the presentation of the liturgical language and acts. He has an introduction, then a description of the act (including language). He concludes with a statement that recapitulates the meaning of the described action. In this case, he has told us that he would describe how they ordained the priests and teachers, and he restates that at the conclusion.
The one addition he makes here is to tell us that these ordinations were done under the power of the Holy Ghost.
Textual: This is the end of a chapter in the 1830 edition.