-reflect the ritardando or accelerando indicated by the feathered beam
-the notes must be grouped as a music expression delimited by braces
-and preceded by a @code{featherDurations} command which specifies
+reflect the @emph{ritardando} or @emph{accelerando} indicated by the
+feathered beam the notes must be grouped as a music expression delimited
+by braces and preceded by a @code{featherDurations} command which specifies