change docstring according to pr feedback

src/JuMP.jl

@@ -330,10 +330,28 @@ function direct_model(backend::MOI.ModelLike)
 end
 
 """
-    direct_model(optimizer::MOI.OptimizerWithAttributes)
+    direct_model(factory::MOI.OptimizerWithAttributes)
 
-Return a new JuMP model that instantiates a [`OptimizerWithAttributes`](@ref) to store the
-model and solve it.
+Create a [`direct_model`](@ref) using `factory`, a `MOI.OptimizerWithAttributes`
+object created by [`optimizer_with_attributes`](@ref).
+
+## Example
+
+```julia
+model = direct_model(
+    optimizer_with_attributes(
+        Gurobi.Optimizer,
+        "Presolve" => 0,
+        "OutputFlag" => 1,
+    )
+)
+```
+is equivalent to:
+```julia
+model = direct_model(Gurobi.Optimizer())
+set_optimizer_attribute(model, "Presolve", 0)
+set_optimizer_attribute(model, "OutputFlag", 1)
+```
 """
 function direct_model(factory::MOI.OptimizerWithAttributes)
     optimizer = MOI.instantiate(factory)