feat(doc): #1092 test pr

- Improve test pr documentation

Signed-off-by: Daniel Salazar <podany270895@gmail.com>

docs/src/api/builtins/test.md

@@ -7,7 +7,7 @@ using [Danger.js](https://danger.systems/js/guides/getting_started.html).
 For more information
 on how to use Danger.js,
 please refer to its
-[Gettings started guide](https://danger.systems/js/guides/getting_started.html).
+[Getting started guide](https://danger.systems/js/guides/getting_started.html).
 
 Types:
 
@@ -33,6 +33,10 @@ Example:
 === "makes.nix"
 
     ```nix
+    {
+      projectPath,
+      ...
+    }:
     {
       testPullRequest = {
         modules = {
@@ -58,6 +62,27 @@ Example:
     $ m . /testPullRequest/github
     ```
 
+=== "/dangerfiles/github.ts"
+
+    ```typescript
+    import { argv } from "node:process";
+
+    import { danger, fail, warn } from "danger";
+
+    const nCommits = danger.git.commits.length;
+    const strict = argv[6] === "strict";
+
+    if (nCommits > 1) {
+      msg = ["Only one commit per PR:\n", `Commits: ${nCommits}`].join("\n")
+      if (strict) {
+        fail(msg);
+      }
+      else {
+        warn(msg);
+      }
+    }
+    ```
+
 
 ## testPython