spell-mes-0.txt is the valhalla formatted text (so you can see how the text is formatted for use).
spell-mes-0-unt.txt is clear text. The lines with nothing in them at the end are actually not empty, they have placeholder formatting that isn't visible in clear text. This was because of the space limits for the English characters. Unfortunately newline disappears, so there is a lack of a space between the two lines where they exist.
fft-wotl-patched.zip should contain the .ffttext file for applying your own patch using the tools.
To add them back to the game you'll have to use the Valhalla spell quote enabling patch.