fix: format new code

src/math/runge_kutta_integration.jl

@@ -58,19 +58,25 @@ julia> exp.([0.0, 0.1])
 # Contributors:
 - [E-W-Jones](https://github.com/E-W-Jones)
 """
-function runge_kutta_integration(f::Function, x0::Real, y0::Real, h::Real, x_stop::Real)
+function runge_kutta_integration(
+    f::Function,
+    x0::Real,
+    y0::Real,
+    h::Real,
+    x_stop::Real,
+)
     h > 0 || throw(DomainError(h, "The step size `h` should be >0."))
 
     x = Float64(x0)
     y = Float64(y0)
     output_x = [x]
     output_y = [y]
-    
+
     while x < x_stop
         k1 = f(x, y)
-        k2 = f(x + h/2, y + k1*h/2)
-        k3 = f(x + h/2, y + k2*h/2)
-        k4 = f(x + h  , y + k3*h  )
+        k2 = f(x + h / 2, y + k1 * h / 2)
+        k3 = f(x + h / 2, y + k2 * h / 2)
+        k4 = f(x + h, y + k3 * h)
 
         y += h * (k1 + 2k2 + 2k3 + k4) / 6
         x += h
@@ -80,4 +86,4 @@ function runge_kutta_integration(f::Function, x0::Real, y0::Real, h::Real, x_sto
     end
 
     return output_x, output_y
-end
+end

test/math.jl

@@ -378,12 +378,20 @@ using TheAlgorithms.Math
     end
 
     @testset "Math: Runge_Kutta Integration" begin
-        @test runge_kutta_integration((x, y)->1, 0, 0, 1, 3) == ([0.0, 1.0, 2.0, 3.0], [0.0, 1.0, 2.0, 3.0])
+        @test runge_kutta_integration((x, y) -> 1, 0, 0, 1, 3) ==
+              ([0.0, 1.0, 2.0, 3.0], [0.0, 1.0, 2.0, 3.0])
         @test begin
-            x, y = runge_kutta_integration((x, y)->cos(x), 0, 0, 1e-4, π/2)
-            isapprox(x[end], π/2; rtol=1e-4) && isapprox(y[end], 1; rtol=1e-4)
+            x, y = runge_kutta_integration((x, y) -> cos(x), 0, 0, 1e-4, π / 2)
+            isapprox(x[end], π / 2; rtol = 1e-4) &&
+                isapprox(y[end], 1; rtol = 1e-4)
         end
-        @test_throws DomainError runge_kutta_integration((x, y)->(), 0, 0, 0, 0)
+        @test_throws DomainError runge_kutta_integration(
+            (x, y) -> (),
+            0,
+            0,
+            0,
+            0,
+        )
     end
 
     @testset "Math: Sum of Arithmetic progression" begin