Breaking Bread actually gives footnotes. Here is what it says:

Note: The Latin text above is reproduced from the Graduale Romanum, 1974. Textual variants are noted below:

1) [verse 2: Donum Dei altíssimi,] formerly Altíssimi donum Dei,
2) [verse 3: Dextrae Dei tu dígitus,] formerly Dígitus patérnae déxterae,
3) [verse 6: Te utriúsque Spíritum] formerly Teque utriúsque Spíritum
4) Verse 7 does not appear in the Graduale Romanum, 1974.

We sing it as "Dig-tus" to get rid of that extra syllable.

Here is the original version, from an unpublished work on Latin Hymns,

Veni, creator Spiritus,
mentes tuorum visita,
imple superna gratia
quae tu creasti pectora.

Qui Paraclitus diceris,
donum Dei altissimi,
fons vivus, ignis, caritas
et spiritalis unctio.

Tu septiformis munere,
dextrae Dei tu digitus,
tu rite promissum Patris, (promisso)
sermone ditans guttura. (ditas)

Accende lumen sensibus,
infunde amorem cordibus,
infirma nostri corporis
virtute firmans perpeti.

Hostem repellas longius,
pacemque dones protinus:
ductore sic te praevio
vitemus omne noxium.

Per te sciamus da Patrem,
noscamus atque Filium;
te utriusque Spiritum
credamus omni tempore.

Gloria Patri Domino
Natoque, qui a mortuis
surrexit ac Paraclito
in saeculorum saecula.

Variant text in brackets, this Hymn among others was revised by Urban VIII, the revised version can be found in the L.U. c.1930 and later. (my L.U. 1910 ed. has the original words but a different doxology)

N.B. The Liber Hymnarius may not have the original words, Lentini's red pen found plenty of work editing the original texts!