Add dry-run parameter to Commit API docs

doc/api/commits.md

@@ -292,9 +292,10 @@ Parameters:
 
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
-| `id`      | integer/string | yes | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user
+| `id`      | integer/string | yes | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user |
 | `sha` | string | yes | The commit hash  |
 | `branch` | string | yes | The name of the branch  |
+| `dry_run` | boolean | no | Don't commit any changes. Default is false. [Introduced in GitLab 13.3](https://gitlab.com/gitlab-org/gitlab/-/issues/231032) |
 
 ```shell
 curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" --form "branch=master" "https://gitlab.example.com/api/v4/projects/5/repository/commits/master/cherry_pick"
@@ -338,6 +339,11 @@ indicates that the commit already exists in the target branch. The other
 possible error code is `conflict`, which indicates that there was a merge
 conflict.
 
+When `dry_run` is enabled, the server will attempt to apply the cherry-pick _but
+not actually commit any resulting changes_. If the cherry-pick applies cleanly,
+the API will respond with `204 No Content`. In the event of a failure, you'll
+see an error identical to a failure without dry-run.
+
 ## Revert a commit
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/22919) in GitLab 11.5.
@@ -355,6 +361,7 @@ Parameters:
 | `id`      | integer/string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) |
 | `sha`     | string         | yes      | Commit SHA to revert                                                            |
 | `branch`  | string         | yes      | Target branch name                                                              |
+| `dry_run` | boolean        | no       | Don't commit any changes. Default is false. [Introduced in GitLab 13.3](https://gitlab.com/gitlab-org/gitlab/-/issues/231032) |
 
 ```shell
 curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" --form "branch=master" "https://gitlab.example.com/api/v4/projects/5/repository/commits/a738f717824ff53aebad8b090c1b79a14f2bd9e8/revert"
@@ -393,6 +400,11 @@ In this case, the revert failed because the attempted revert generated a merge
 conflict. The other possible error code is `empty`, which indicates that the
 changeset was empty, likely due to the change having already been reverted.
 
+When `dry_run` is enabled, the server will attempt to apply the revert _but not
+actually commit any resulting changes_. If the revert applies cleanly, the API
+will respond with `204 No Content`. In the event of a failure, you'll see an
+error identical to a failure without dry-run.
+
 ## Get the diff of a commit
 
 Get the diff of a commit in a project.