Add language declarations to code blocks

This commit adds more language declarations to code blocks in
the API documentation.

doc/api/README.md

@@ -355,7 +355,7 @@ curl --head --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example
 
 The response will then be:
 
-```
+```http
 HTTP/1.1 200 OK
 Cache-Control: no-cache
 Content-Length: 1103
@@ -415,7 +415,7 @@ curl --request GET --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab
 
 The response header includes a link to the next page. For example:
 
-```
+```http
 HTTP/1.1 200 OK
 ...
 Link: <https://gitlab.example.com/api/v4/projects?pagination=keyset&per_page=50&order_by=id&sort=asc&id_after=42>; rel="next"
@@ -540,7 +540,7 @@ Such errors appear in two cases:
 
 When an attribute is missing, you will get something like:
 
-```
+```http
 HTTP/1.1 400 Bad Request
 Content-Type: application/json
 {
@@ -551,7 +551,7 @@ Content-Type: application/json
 When a validation error occurs, error messages will be different. They will
 hold all details of validation errors:
 
-```
+```http
 HTTP/1.1 400 Bad Request
 Content-Type: application/json
 {
@@ -589,7 +589,7 @@ follows:
 
 When you try to access an API URL that does not exist you will receive 404 Not Found.
 
-```
+```http
 HTTP/1.1 404 Not Found
 Content-Type: application/json
 {

doc/api/pipeline_triggers.md

@@ -6,7 +6,7 @@ You can read more about [triggering pipelines through the API](../ci/triggers/RE
 
 Get a list of project's build triggers.
 
-```
+```plaintext
 GET /projects/:id/triggers
 ```
 
@@ -14,7 +14,7 @@ GET /projects/:id/triggers
 |-----------|---------|----------|---------------------|
 | `id`      | integer/string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user |
 
-```
+```shell
 curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/triggers"
 ```
 
@@ -36,7 +36,7 @@ curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/a
 
 Get details of project's build trigger.
 
-```
+```plaintext
 GET /projects/:id/triggers/:trigger_id
 ```
 
@@ -45,7 +45,7 @@ GET /projects/:id/triggers/:trigger_id
 | `id`         | integer/string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user      |
 | `trigger_id` | integer | yes      | The trigger id           |
 
-```
+```shell
 curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/triggers/5"
 ```
 
@@ -65,7 +65,7 @@ curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/a
 
 Create a trigger for a project.
 
-```
+```plaintext
 POST /projects/:id/triggers
 ```
 
@@ -74,7 +74,7 @@ POST /projects/:id/triggers
 | `id`          | integer/string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user      |
 | `description` | string  | yes      | The trigger name         |
 
-```
+```shell
 curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" --form description="my description" "https://gitlab.example.com/api/v4/projects/1/triggers"
 ```
 
@@ -94,7 +94,7 @@ curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" --form descrip
 
 Update a trigger for a project.
 
-```
+```plaintext
 PUT /projects/:id/triggers/:trigger_id
 ```
 
@@ -104,7 +104,7 @@ PUT /projects/:id/triggers/:trigger_id
 | `trigger_id`  | integer | yes      | The trigger id           |
 | `description` | string  | no       | The trigger name         |
 
-```
+```shell
 curl --request PUT --header "PRIVATE-TOKEN: <your_access_token>" --form description="my description" "https://gitlab.example.com/api/v4/projects/1/triggers/10"
 ```
 
@@ -124,7 +124,7 @@ curl --request PUT --header "PRIVATE-TOKEN: <your_access_token>" --form descript
 
 Remove a project's build trigger.
 
-```
+```plaintext
 DELETE /projects/:id/triggers/:trigger_id
 ```
 
@@ -133,6 +133,6 @@ DELETE /projects/:id/triggers/:trigger_id
 | `id`           | integer/string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user      |
 | `trigger_id`   | integer | yes      | The trigger id           |
 
-```
+```shell
 curl --request DELETE --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/triggers/5"
 ```

doc/api/releases/links.md

@@ -9,7 +9,7 @@ GitLab supports links links to `http`, `https`, and `ftp` assets.
 
 Get assets as links from a Release.
 
-```
+```plaintext
 GET /projects/:id/releases/:tag_name/assets/links
 ```
 
@@ -47,7 +47,7 @@ Example response:
 
 Get an asset as a link from a Release.
 
-```
+```plaintext
 GET /projects/:id/releases/:tag_name/assets/links/:link_id
 ```
 
@@ -78,7 +78,7 @@ Example response:
 
 Create an asset as a link from a Release.
 
-```
+```plaintext
 POST /projects/:id/releases/:tag_name/assets/links
 ```
 
@@ -114,7 +114,7 @@ Example response:
 
 Update an asset as a link from a Release.
 
-```
+```plaintext
 PUT /projects/:id/releases/:tag_name/assets/links/:link_id
 ```
 
@@ -150,7 +150,7 @@ Example response:
 
 Delete an asset as a link from a Release.
 
-```
+```plaintext
 DELETE /projects/:id/releases/:tag_name/assets/links/:link_id
 ```
 

doc/api/search.md

@@ -751,7 +751,7 @@ Search within the specified project.
 
 If a user is not a member of a project and the project is private, a `GET` request on that project will result to a `404` status code.
 
-```
+```plaintext
 GET /projects/:id/search
 ```
 

doc/api/settings.md

@@ -10,7 +10,7 @@ administrator in order to perform this action.
 List the current [application settings](#list-of-settings-that-can-be-accessed-via-api-calls)
 of the GitLab instance.
 
-```
+```plaintext
 GET /application/settings
 ```
 
@@ -90,7 +90,7 @@ the `file_template_project_id`, `deletion_adjourned_period`, or the `geo_node_al
 Use an API call to modify GitLab instance
 [application settings](#list-of-settings-that-can-be-accessed-via-api-calls).
 
-```
+```plaintext
 PUT /application/settings
 ```
 

doc/api/sidekiq_metrics.md

@@ -10,7 +10,7 @@ of Sidekiq, its jobs, queues, and processes.
 List information about all the registered queues, their backlog and their
 latency.
 
-```
+```plaintext
 GET /sidekiq/queue_metrics
 ```
 
@@ -35,7 +35,7 @@ Example response:
 
 List information about all the Sidekiq workers registered to process your queues.
 
-```
+```plaintext
 GET /sidekiq/process_metrics
 ```
 
@@ -77,7 +77,7 @@ Example response:
 
 List information about the jobs that Sidekiq has performed.
 
-```
+```plaintext
 GET /sidekiq/job_stats
 ```
 
@@ -102,7 +102,7 @@ Example response:
 
 List all the currently available information about Sidekiq.
 
-```
+```plaintext
 GET /sidekiq/compound_metrics
 ```
 

doc/api/statistics.md

@@ -8,7 +8,7 @@ administrator in order to perform this action.
 NOTE: **Note:**
 These statistics are approximate.
 
-```
+```plaintext
 GET /application/statistics
 ```
 

doc/api/suggestions.md

@@ -7,7 +7,7 @@ Every API call to suggestions must be authenticated.
 Applies a suggested patch in a merge request. Users must be
 at least [Developer](../user/permissions.md) to perform such action.
 
-```
+```plaintext
 PUT /suggestions/:id/apply
 ```
 

doc/api/system_hooks.md

@@ -11,7 +11,7 @@ Read more about [system hooks](../system_hooks/system_hooks.md).
 
 Get a list of all system hooks.
 
-```
+```plaintext
 GET /hooks
 ```
 
@@ -42,7 +42,7 @@ Example response:
 
 Add a new system hook.
 
-```
+```plaintext
 POST /hooks
 ```
 
@@ -81,7 +81,7 @@ Example response:
 
 ## Test system hook
 
-```
+```plaintext
 GET /hooks/:id
 ```
 
@@ -112,7 +112,7 @@ Example response:
 
 Deletes a system hook.
 
-```
+```plaintext
 DELETE /hooks/:id
 ```
 

doc/api/tags.md

@@ -6,7 +6,7 @@ Get a list of repository tags from a project, sorted by name in reverse
 alphabetical order. This endpoint can be accessed without authentication if the
 repository is publicly accessible.
 
-```
+```plaintext
 GET /projects/:id/repository/tags
 ```
 
@@ -57,7 +57,7 @@ Parameters:
 Get a specific repository tag determined by its name. This endpoint can be
 accessed without authentication if the repository is publicly accessible.
 
-```
+```plaintext
 GET /projects/:id/repository/tags/:tag_name
 ```
 
@@ -104,7 +104,7 @@ Example Response:
 
 Creates a new tag in the repository that points to the supplied ref.
 
-```
+```plaintext
 POST /projects/:id/repository/tags
 ```
 
@@ -164,7 +164,7 @@ status code `405` with an explaining error message is returned.
 
 Deletes a tag of a repository with given name.
 
-```
+```plaintext
 DELETE /projects/:id/repository/tags/:tag_name
 ```
 
@@ -178,7 +178,7 @@ Parameters:
 Add release notes to the existing Git tag. If there
 already exists a release for the given tag, status code `409` is returned.
 
-```
+```plaintext
 POST /projects/:id/repository/tags/:tag_name/release
 ```
 
@@ -210,7 +210,7 @@ Response:
 
 Updates the release notes of a given release.
 
-```
+```plaintext
 PUT /projects/:id/repository/tags/:tag_name/release
 ```
 

doc/api/templates/dockerfiles.md

@@ -12,7 +12,7 @@ information on Dockerfiles, see the
 
 Get all Dockerfile templates.
 
-```
+```plaintext
 GET /templates/dockerfiles
 ```
 
@@ -99,7 +99,7 @@ Example response:
 
 Get a single Dockerfile template.
 
-```
+```plaintext
 GET /templates/dockerfiles/:key
 ```
 

doc/api/templates/licenses.md

@@ -13,7 +13,7 @@ resources available online.
 
 Get all license templates.
 
-```
+```plaintext
 GET /templates/licenses
 ```
 
@@ -110,7 +110,7 @@ Example response:
 Get a single license template. You can pass parameters to replace the license
 placeholder.
 
-```
+```plaintext
 GET /templates/licenses/:key
 ```
 

doc/api/todos.md

@@ -7,7 +7,7 @@
 Returns a list of todos. When no filter is applied, it returns all pending todos
 for the current user. Different filters allow the user to precise the request.
 
-```
+```plaintext
 GET /todos
 ```
 
@@ -184,7 +184,7 @@ Example Response:
 Marks a single pending todo given by its ID for the current user as done. The
 todo marked as done is returned in the response.
 
-```
+```plaintext
 POST /todos/:id/mark_as_done
 ```
 
@@ -280,7 +280,7 @@ Example Response:
 
 Marks all pending todos for the current user as done. It returns the HTTP status code `204` with an empty response.
 
-```
+```plaintext
 POST /todos/mark_as_done
 ```