Update README.md

Author: ChrisRackauckas

README.md

@@ -43,17 +43,17 @@ end
 
 For this function, we know that the sparsity pattern of the Jacobian is a
 `Tridiagonal` matrix. However, if we didn't know the sparsity pattern for
-the Jacobian, we could use the `sparsity!` function to automatically
+the Jacobian, we could use the `jacobian_sparsity` function to automatically
 detect the sparsity pattern. This function is only available if you
 load SparsityDetection.jl as well. We declare that the function `f` outputs a
-vector of length 30 and takes in a vector of length 30, and `sparsity!` spits
+vector of length 30 and takes in a vector of length 30, and `jacobian_sparsity` spits
 out a `Sparsity` object which we can turn into a `SparseMatrixCSC`:
 
 ```julia
 using SparsityDetection, SparseArrays
 input = rand(30)
 output = similar(input)
-sparsity_pattern = sparsity!(f,output,input)
+sparsity_pattern = jacobian_sparsity(f,output,input)
 jac = Float64.(sparse(sparsity_pattern))
 ```