unnamed port error

[lfanele]

hi,
i guess this is just some stupid mistake on my behalf: i can't get  
this code to work, because I always get an  "Parsing...<unnamed  
port>: In expression ’font-shape: <unnamed port>: Unbound variable:  
’font-shape" error. i'm not really a programmer, so I don't know what  
to do about that.
thanks for your help,
stephen

\version "2.6.3"

\layout    {
    \context
        {\Staff
            \remove Time_signature_engraver
            \remove Bar_engraver }
    \context
        {\Lyrics
           \override LyricText #’font-shape = #’italic }
}


notation =
\relative c'
{
\clef treble
c1 d e f g a b c
}

text = \lyricmode
{
what1 am I doing wrong here ? ? ?
}


\score
{
<<
\context Staff = notation \notation
\context Lyrics = text \text
>>
}