The collision on the second measure happens because
-@code{\merge-differently-headed} cannot successfully complete the
+@code{\mergeDifferentlyHeadedOn} cannot successfully complete the
merge when three or more notes line up in the same column -- in
fact, you will obtain a warning for this reason. To allow the
merge to work properly, apply a @code{\shift} to the note that
should not be merged. Here, @code{\shiftOn} is applied to move
the top @code{g} out of the column, and
-@code{\merge-differently-headed} works properly.
+@code{\mergeDifferentlyHeadedOn} works properly.
@lilypond[quote,relative=2,verbatim]
<<
@knownissues
-When using @code{\merge-differently-headed} with an upstem eighth
+When using @code{\mergeDifferentlyHeadedOn} with an upstem eighth
or a shorter note, and a downstem half note, the eighth note stem
gets a slightly wrong offset because of the different width of the
half note head symbol.