odd statement in NR

[Mark Polesky]

In NR 1.2.3 "Displaying rhythms -- Upbeats", the known
issues states:

  The \partial command is intended to be used only at the
  beginning of a piece.  If you use it after the beginning,
  some odd warnings or effects may occur, in this case use
  \set Timing.measurePosition instead.

Shouldn't that be measureLength instead of measurePosition?
- Mark