Add reference to documentation on Base.Order in isless() docstring

JuliaLang · Aug 3, 2020 · 8a7c3d9 · 8a7c3d9
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diff --git a/base/operators.jl b/base/operators.jl
@@ -150,6 +150,8 @@ This is the default comparison used by [`sort`](@ref).
 Non-numeric types with a total order should implement this function.
 Numeric types only need to implement it if they have special values such as `NaN`.
 Types with a partial order should implement [`<`](@ref).
+See the documentation on [Alternate orderings](@ref) for how to define alternate
+ordering methods that can be used in sorting and related functions.
 
 # Examples
  ```jldoctest