Discuss the difference in precedence for the : operator between R a…

…nd Julia. (#41681)

doc/src/manual/noteworthy-differences.md

@@ -163,6 +163,9 @@ For users coming to Julia from R, these are some noteworthy differences:
  * In Julia, a range like `a:b` is not shorthand for a vector like in R, but is a specialized `AbstractRange`
  object that is used for iteration. To convert a range into a vector, use
  [`collect(a:b)`](@ref).
+ * The `:` operator has a different precedence in R and Julia. In particular, in Julia arithmetic operators
+ have higher precedence than the `:` operator, whereas the reverse is true in R. For example, `1:n-1` in
+ Julia is equivalent to `1:(n-1)` in R.
  * Julia's [`max`](@ref) and [`min`](@ref) are the equivalent of `pmax` and `pmin` respectively
  in R, but both arguments need to have the same dimensions. While [`maximum`](@ref) and [`minimum`](@ref)
  replace `max` and `min` in R, there are important differences.