Changed behaviour of tag and partCombine

[Timothy Lanfear]

From at least 2.18 to 2.23.3, it was possible to place \tag and 
\keepWithTag outside of \partCombine. Version 2.23.4 requires the 
tagging inside \partCombine. I do have a lot of files expecting the old 
behaviour.

\version "2.22.1"

{
  \keepWithTag #'t \tag #'t \partCombine c''1 c'1
}

{
  \partCombine \keepWithTag #'t \tag #'t c''1 \keepWithTag #'t \tag #'t c'1
}

--
Timothy Lanfear, Bristol, UK.