2.23.5 articulate.ly and repeat alternatives

[Joel C. Salomon]

A nice thing I’ve discovered in reviving my old (2.18) project is that 
articulate.ly now expands repeats without `\unfoldRepeats`.  A less-nice 
thing is that this behavior behaves oddly around `\alternative`:

    \version "2.23.5"
    \include "articulate.ly"

    music = \relative c' {
      c1
      \repeat volta 2 {
        e
        \alternative {
          { g } { gis }
        }
      }
      b
    }

    \score { \music }
    \score { \unfoldRepeats \music }
    \score { \articulate \music }
    \score { \articulate \unfoldRepeats \music }

Both alternatives print each time with `\articulate`, though naked 
`\unfoldRepeats` works on its own.

(And `\articulate \unfoldRepeats` behaves the same as `\articulate`, 
which suggests my mental model of these as music functions is missing 
something.)

—Joel C. Salomon