\caps and \fontCaps don’t work as expected

[Malte Meyn]

Hi list,

\caps doesn’t work if unless it’s the very last markup command before 
the actual text.

\fontCaps seems to have no effect at all. Shouldn’t it enable the smcp 
feature?

Cheers,
Malte

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\version "2.21.0"

\markup \bold \caps "AaBbCc" % ok
\markup \caps \bold "AaBbCc" % FAIL

\markup \caps { "Aa" "Bb" "Cc" } % ok
\markup \caps \line { "Aa" "Bb" "Cc" } % FAIL

\markup \bold \override #'(font-features . ("smcp")) "AaBbCc" % ok
\markup \override #'(font-features . ("smcp")) \bold "AaBbCc" % ok

\markup \fontCaps "AaBbCc"   % FAIL
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