fix missing doc lints in tests

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "varpro"
-version = "0.10.0"
+version = "0.10.1"
 authors = ["geo-ant"]
 edition = "2021"
 license = "MIT"

README.md

@@ -6,16 +6,12 @@
 [![crates](https://img.shields.io/crates/v/varpro)](https://crates.io/crates/varpro)
 [![Coverage Status](https://coveralls.io/repos/github/geo-ant/varpro/badge.svg?branch=main)](https://coveralls.io/github/geo-ant/varpro?branch=main)
 ![maintenance-status](https://img.shields.io/badge/maintenance-actively--developed-brightgreen.svg)
+[![crates](https://raw.githubusercontent.com/geo-ant/user-content/refs/heads/main/ko-fi-support.svg)](https://ko-fi.com/geoant)
 
 Nonlinear function fitting made simple. This library provides robust and fast 
 least-squares fitting of a wide class of model functions to data.
 It uses the VarPro algorithm to achieve this, hence the name.
 
-## Support
-
-If you like this crate, recommend it to others. You can also [buy me a coffee](https://ko-fi.com/geoant)
-if you feel like it.
-
 ## Introduction
 
 This crate implements a powerful algorithm to fit model functions to data, 

src/model/mod.rs

@@ -12,6 +12,7 @@ pub mod errors;
 pub mod builder;
 mod model_basis_function;
 #[cfg(any(test, doctest))]
+#[allow(missing_docs)]
 pub mod test;
 
 /// Represents an abstraction for a separable nonlinear model

src/test_helpers/mod.rs

@@ -1,3 +1,4 @@
+#![allow(missing_docs)]
 pub mod differentiation;
 
 use nalgebra::{DVector, Scalar};