When covering major events that are directly linked to the liturgical work and authority of the pope, it never hurts to spend some time reading the Catechism of the Catholic Church. In this case, let's look at the material found at this reference point: Paragraph 2391 -- IV. Offenses Against the Dignity of Marriage.
Some today claim a “right to a trial marriage” where there is an intention of getting married later. However firm the purpose of those who engage in premature sexual relations may be, “the fact is that such liaisons can scarcely ensure mutual sincerity and fidelity in a relationship between a man and a woman, nor, especially, can they protect it from inconstancy of desires or whim.” 184 Carnal union is morally legitimate only when a definitive community of life between a man and woman has been established. Human love does not tolerate “trial marriages.” It demands a total and definitive gift of persons to one another. 185 (2364)
Now, with that in mind, let's look at some important -- yes, rather picky -- issues of verb tense in the mainstream news coverage of that remarkable wedding rite that took place at the Vatican.