Rename testing function

Author: serenity4

test/validation.jl

@@ -11,7 +11,12 @@ const *ᵢ = Core.Intrinsics.mul_float
 const +ᵢ = Core.Intrinsics.add_float
 const -ᵢ = Core.Intrinsics.sub_float
 
-function f()
+@noinline function onecall!()
+    x = continuous()
+    always!(ddt(x) - x)
+end
+
+function multiple_linear_equations!()
     x₁ = continuous() # selected
     x₂ = continuous() # selected
     x₃ = continuous() # algebraic, optimized away
@@ -22,11 +27,6 @@ function f()
     always!(x₄ *ᵢ x₄ -ᵢ ddt(x₁))
 end
 
-@noinline function onecall!()
-    x = continuous()
-    always!(ddt(x) - x)
-end
-
 @noinline function sin!()
     x = continuous()
     always!(ddt(x) - sin(x))
@@ -90,7 +90,7 @@ end
 
     u = [3.0, 1.0, 100.0, 4.0]
     du = [3.0, 0.0, 0.0, 0.0]
-    residuals, expanded_residuals = compute_residual_vectors(f, u, du)
+    residuals, expanded_residuals = compute_residual_vectors(multiple_linear_equations!, u, du)
     @test residuals ≈ [0.0, -3.0, 97.0, 13.0]
     @test residuals ≈ expanded_residuals