Partially formatting syllables in lyrics

[Fr. Samuel Springuel]

How can I apply italics to part of a syllable in the lyrics context?  When I 
use the method I usually use to apply italics, it automatically creates a new 
syllable:

#(ly:set-option 'relative-includes #t)
\version "2.20.0"

\new Staff
<<
    \new Voice = "mel" { c' c' }
    \new Lyrics \lyricsto "mel" { \lyricmode { hat\override 
Lyrics.LyricText.font-shape = #'italic (s) \revert Lyrics.LyricText.font-shape 
show } }
>>


✝✝✝✝✝✝✝✝✝✝✝✝✝✝✝✝✝✝✝✝✝✝✝✝✝✝
Fr. Samuel, OSB
(R. Padraic Springuel)
St. Anselm’s Abbey
4501 South Dakota Ave, NE
Washington, DC, 20017
202-269-2300
(c) 202-853-7036

PAX ☧ ΧΡΙΣΤΟΣ