still one occurency of \times in LM

[Federico Bruni]

David,

while updating the italian doc I've noticed that you missed this occurency
of \times in learning/fundamental.itely:

To these we should add other constructs which generate lines
between or across notes: ties (marked by a tilde, @code{~}),
tuplets written as @code{\times x/y @address@hidden, and grace notes
written as @address@hidden@}}.