Merge pull request jump-dev#2175 from dourouc05/patch-1

Remove a comment that is no more relevant.

src/macros.jl

@@ -163,10 +163,10 @@ _functionize(::MutableArithmetics.Zero) = 0.0
 function parse_one_operator_constraint(_error::Function, vectorized::Bool, sense::Val, lhs, rhs)
     # Simple comparison - move everything to the LHS.
     #
-    # Note: We add the +0 to this term to account for the pathological case that
-    # the `lhs` is a `VariableRef` and the `rhs` is a summation with no terms.
-    # Without the `+0` term, `aff` would evaluate to a `VariableRef` when we
-    # really want it to be a `GenericAffExpr`.
+    # `_functionize` deals with the pathological case where the `lhs` is a `VariableRef` 
+    # and the `rhs` is a summation with no terms. `_build_call` should be passed a 
+    # `GenericAffExpr` or a `GenericQuadExpr`, and not a `VariableRef` as would be the case 
+    # without `_functionize`.
     if vectorized
         func = :($lhs .- $rhs)
     else