Add language identifiers to code blocks

These API pages had code blocks that were missing language
declarations.

doc/api/epic_links.md

@@ -15,7 +15,7 @@ Epics are available only in the [Ultimate/Gold tier](https://about.gitlab.com/pr
 
 Gets all child epics of an epic.
 
-```
+```plaintext
 GET /groups/:id/epics/:epic_iid/epics
 ```
 
@@ -69,7 +69,7 @@ Example response:
 
 Creates an association between two epics, designating one as the parent epic and the other as the child epic. A parent epic can have multiple child epics. If the new child epic already belonged to another epic, it is unassigned from that previous parent.
 
-```
+```plaintext
 POST /groups/:id/epics/:epic_iid/epics
 ```
 
@@ -122,7 +122,7 @@ Example response:
 
 Creates a a new epic and associates it with provided parent epic. The response is LinkedEpic object.
 
-```
+```plaintext
 POST /groups/:id/epics/:epic_iid/epics
 ```
 
@@ -155,7 +155,7 @@ Example response:
 
 ## Re-order a child epic
 
-```
+```plaintext
 PUT /groups/:id/epics/:epic_iid/epics/:child_epic_id
 ```
 
@@ -212,7 +212,7 @@ Example response:
 
 Unassigns a child epic from a parent epic.
 
-```
+```plaintext
 DELETE /groups/:id/epics/:epic_iid/epics/:child_epic_id
 ```
 

doc/api/feature_flags.md

@@ -15,7 +15,7 @@ are [paginated](README.md#pagination).
 
 Gets all feature flags of the requested project.
 
-```
+```plaintext
 GET /projects/:id/feature_flags
 ```
 
@@ -145,7 +145,7 @@ Example response:
 
 Creates a new feature flag.
 
-```
+```plaintext
 POST /projects/:id/feature_flags
 ```
 
@@ -219,7 +219,7 @@ Example response:
 
 Gets a single feature flag.
 
-```
+```plaintext
 GET /projects/:id/feature_flags/:name
 ```
 
@@ -294,7 +294,7 @@ Example response:
 
 Deletes a feature flag.
 
-```
+```plaintext
 DELETE /projects/:id/feature_flags/:name
 ```
 

doc/api/issues_statistics.md

@@ -123,7 +123,7 @@ Example response:
 
 Gets issues count statistics for given project.
 
-```
+```plaintext
 GET /projects/:id/issues_statistics
 GET /projects/:id/issues_statistics?labels=foo
 GET /projects/:id/issues_statistics?labels=foo,bar

doc/api/members.md

@@ -4,7 +4,7 @@
 
 The access levels are defined in the `Gitlab::Access` module. Currently, these levels are recognized:
 
-```
+```plaintext
 10 => Guest access
 20 => Reporter access
 30 => Developer access

doc/api/oauth2.md

@@ -112,7 +112,7 @@ easily accessible, therefore secrets can leak easily.
 To request the access token, you should redirect the user to the
 `/oauth/authorize` endpoint using `token` response type:
 
-```
+```plaintext
 https://gitlab.example.com/oauth/authorize?client_id=APP_ID&redirect_uri=REDIRECT_URI&response_type=token&state=YOUR_UNIQUE_STATE_HASH&scope=REQUESTED_SCOPES
 ```
 
@@ -124,7 +124,7 @@ would request `read_user` and `profile` scopes). The redirect
 will include a fragment with `access_token` as well as token details in GET
 parameters, for example:
 
-```
+```plaintext
 http://myapp.com/oauth/redirect#access_token=ABCDExyz123&state=YOUR_UNIQUE_STATE_HASH&token_type=bearer&expires_in=3600
 ```
 
@@ -182,7 +182,7 @@ curl --data "@auth.txt" --request POST https://gitlab.example.com/oauth/token
 
 Then, you'll receive the access token back in the response:
 
-```
+```json
 {
   "access_token": "1f0af717251950dbd4d73154fdf0a474a5c5119adad999683f5b450c460726aa",
   "token_type": "bearer",
@@ -192,7 +192,7 @@ Then, you'll receive the access token back in the response:
 
 For testing, you can use the `oauth2` Ruby gem:
 
-```
+```ruby
 client = OAuth2::Client.new('the_client_id', 'the_client_secret', :site => "http://example.com")
 access_token = client.password.get_token('user@example.com', 'secret')
 puts access_token.token
@@ -203,13 +203,13 @@ puts access_token.token
 The `access token` allows you to make requests to the API on behalf of a user.
 You can pass the token either as GET parameter:
 
-```
+```plaintext
 GET https://gitlab.example.com/api/v4/user?access_token=OAUTH-TOKEN
 ```
 
 or you can put the token to the Authorization header:
 
-```
+```shell
 curl --header "Authorization: Bearer OAUTH-TOKEN" https://gitlab.example.com/api/v4/user
 ```
 
@@ -222,7 +222,7 @@ You must supply the access token, either:
 
 - As a parameter:
 
-   ```
+   ```plaintext
    GET https://gitlab.example.com/oauth/token/info?access_token=<OAUTH-TOKEN>
    ```
 

doc/api/packages.md

@@ -11,7 +11,7 @@ This is the API docs of [GitLab Packages](../administration/packages/index.md).
 Get a list of project packages. Both Maven and NPM packages are included in results.
 When accessed without authentication, only packages of public projects are returned.
 
-```
+```plaintext
 GET /projects/:id/packages
 ```
 
@@ -55,7 +55,7 @@ By default, the `GET` request will return 20 results, since the API is [paginate
 Get a list of project packages at the group level.
 When accessed without authentication, only packages of public projects are returned.
 
-```
+```plaintext
 GET /groups/:id/packages
 ```
 
@@ -134,7 +134,7 @@ The `_links` object contains the following properties:
 
 Get a single project package.
 
-```
+```plaintext
 GET /projects/:id/packages/:package_id
 ```
 
@@ -185,7 +185,7 @@ The `_links` object contains the following properties:
 
 Get a list of package files of a single package.
 
-```
+```plaintext
 GET /projects/:id/packages/:package_id/package_files
 ```
 
@@ -240,7 +240,7 @@ By default, the `GET` request will return 20 results, since the API is [paginate
 
 Deletes a project package.
 
-```
+```plaintext
 DELETE /projects/:id/packages/:package_id
 ```
 

doc/api/pipeline_schedules.md

@@ -6,7 +6,7 @@ You can read more about [pipeline schedules](../user/project/pipelines/schedules
 
 Get a list of the pipeline schedules of a project.
 
-```
+```plaintext
 GET /projects/:id/pipeline_schedules
 ```
 
@@ -47,7 +47,7 @@ curl --header "PRIVATE-TOKEN: k5ESFgWY2Qf5xEvDcFxZ" "https://gitlab.example.com/
 
 Get the pipeline schedule of a project.
 
-```
+```plaintext
 GET /projects/:id/pipeline_schedules/:pipeline_schedule_id
 ```
 
@@ -99,7 +99,7 @@ curl --header "PRIVATE-TOKEN: k5ESFgWY2Qf5xEvDcFxZ" "https://gitlab.example.com/
 
 Create a new pipeline schedule of a project.
 
-```
+```plaintext
 POST /projects/:id/pipeline_schedules
 ```
 
@@ -143,7 +143,7 @@ curl --request POST --header "PRIVATE-TOKEN: k5ESFgWY2Qf5xEvDcFxZ" --form descri
 
 Updates the pipeline schedule  of a project. Once the update is done, it will be rescheduled automatically.
 
-```
+```plaintext
 PUT /projects/:id/pipeline_schedules/:pipeline_schedule_id
 ```
 
@@ -193,7 +193,7 @@ curl --request PUT --header "PRIVATE-TOKEN: k5ESFgWY2Qf5xEvDcFxZ" --form cron="0
 
 Update the owner of the pipeline schedule of a project.
 
-```
+```plaintext
 POST /projects/:id/pipeline_schedules/:pipeline_schedule_id/take_ownership
 ```
 
@@ -238,7 +238,7 @@ curl --request POST --header "PRIVATE-TOKEN: hf2CvZXB9w8Uc5pZKpSB" "https://gitl
 
 Delete the pipeline schedule of a project.
 
-```
+```plaintext
 DELETE /projects/:id/pipeline_schedules/:pipeline_schedule_id
 ```
 
@@ -317,7 +317,7 @@ Example response:
 
 Create a new variable of a pipeline schedule.
 
-```
+```plaintext
 POST /projects/:id/pipeline_schedules/:pipeline_schedule_id/variables
 ```
 
@@ -345,7 +345,7 @@ curl --request POST --header "PRIVATE-TOKEN: k5ESFgWY2Qf5xEvDcFxZ" --form "key=N
 
 Updates the variable of a pipeline schedule.
 
-```
+```plaintext
 PUT /projects/:id/pipeline_schedules/:pipeline_schedule_id/variables/:key
 ```
 
@@ -373,7 +373,7 @@ curl --request PUT --header "PRIVATE-TOKEN: k5ESFgWY2Qf5xEvDcFxZ" --form "value=
 
 Delete the variable of a pipeline schedule.
 
-```
+```plaintext
 DELETE /projects/:id/pipeline_schedules/:pipeline_schedule_id/variables/:key
 ```
 

doc/api/pipelines.md

@@ -4,7 +4,7 @@
 
 > [Introduced][ce-5837] in GitLab 8.11
 
-```
+```plaintext
 GET /projects/:id/pipelines
 ```
 
@@ -23,7 +23,7 @@ GET /projects/:id/pipelines
 | `order_by`| string  | no       | Order pipelines by `id`, `status`, `ref`, `updated_at` or `user_id` (default: `id`) |
 | `sort`    | string  | no       | Sort pipelines in `asc` or `desc` order (default: `desc`) |
 
-```
+```shell
 curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/pipelines"
 ```
 
@@ -56,7 +56,7 @@ Example of response
 
 > [Introduced][ce-5837] in GitLab 8.11
 
-```
+```plaintext
 GET /projects/:id/pipelines/:pipeline_id
 ```
 
@@ -65,7 +65,7 @@ GET /projects/:id/pipelines/:pipeline_id
 | `id`       | integer/string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user |
 | `pipeline_id` | integer | yes      | The ID of a pipeline   |
 
-```
+```shell
 curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/pipelines/46"
 ```
 
@@ -101,7 +101,7 @@ Example of response
 
 ### Get variables of a pipeline
 
-```
+```plaintext
 GET /projects/:id/pipelines/:pipeline_id/variables
 ```
 
@@ -110,7 +110,7 @@ GET /projects/:id/pipelines/:pipeline_id/variables
 | `id`       | integer/string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user |
 | `pipeline_id` | integer | yes      | The ID of a pipeline   |
 
-```
+```shell
 curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/pipelines/46/variables"
 ```
 
@@ -134,7 +134,7 @@ Example of response
 
 > [Introduced][ce-7209] in GitLab 8.14
 
-```
+```plaintext
 POST /projects/:id/pipeline
 ```
 
@@ -144,7 +144,7 @@ POST /projects/:id/pipeline
 | `ref`       | string  | yes      | Reference to commit |
 | `variables` | array   | no       | An array containing the variables available in the pipeline, matching the structure `[{ 'key' => 'UPLOAD_TO_S3', 'variable_type' => 'file', 'value' => 'true' }]` |
 
-```
+```shell
 curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/pipeline?ref=master"
 ```
 
@@ -182,7 +182,7 @@ Example of response
 
 > [Introduced][ce-5837] in GitLab 8.11
 
-```
+```plaintext
 POST /projects/:id/pipelines/:pipeline_id/retry
 ```
 
@@ -191,7 +191,7 @@ POST /projects/:id/pipelines/:pipeline_id/retry
 | `id`       | integer/string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user |
 | `pipeline_id` | integer | yes   | The ID of a pipeline |
 
-```
+```shell
 curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/pipelines/46/retry"
 ```
 
@@ -229,7 +229,7 @@ Response:
 
 > [Introduced][ce-5837] in GitLab 8.11
 
-```
+```plaintext
 POST /projects/:id/pipelines/:pipeline_id/cancel
 ```
 
@@ -238,7 +238,7 @@ POST /projects/:id/pipelines/:pipeline_id/cancel
 | `id`       | integer/string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user |
 | `pipeline_id` | integer | yes   | The ID of a pipeline |
 
-```
+```shell
 curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/pipelines/46/cancel"
 ```
 
@@ -276,7 +276,7 @@ Response:
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/22988) in GitLab 11.6.
 
-```
+```plaintext
 DELETE /projects/:id/pipelines/:pipeline_id
 ```
 
@@ -285,7 +285,7 @@ DELETE /projects/:id/pipelines/:pipeline_id
 | `id`       | integer/string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user |
 | `pipeline_id` | integer | yes      | The ID of a pipeline   |
 
-```
+```shell
 curl --header "PRIVATE-TOKEN: <your_access_token>" --request "DELETE" "https://gitlab.example.com/api/v4/projects/1/pipelines/46"
 ```
 

doc/api/project_aliases.md

@@ -8,11 +8,11 @@ All methods require administrator authorization.
 
 Get a list of all project aliases:
 
-```
+```plaintext
 GET /project_aliases
 ```
 
-```
+```shell
 curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/project_aliases"
 ```
 
@@ -37,7 +37,7 @@ Example response:
 
 Get details of a project alias:
 
-```
+```plaintext
 GET /project_aliases/:name
 ```
 
@@ -45,7 +45,7 @@ GET /project_aliases/:name
 |-----------|--------|----------|-----------------------|
 | `name`    | string | yes      | The name of the alias |
 
-```
+```shell
 curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/project_aliases/gitlab"
 ```
 
@@ -64,7 +64,7 @@ Example response:
 Add a new alias for a project. Responds with a 201 when successful,
 400 when there are validation errors (e.g. alias already exists):
 
-```
+```plaintext
 POST /project_aliases
 ```
 
@@ -73,13 +73,13 @@ POST /project_aliases
 | `project_id` | integer/string | yes      | The ID or path of the project.         |
 | `name`       | string         | yes      | The name of the alias. Must be unique. |
 
-```
+```shell
 curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/project_aliases" --form "project_id=1" --form "name=gitlab"
 ```
 
 or
 
-```
+```shell
 curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/project_aliases" --form "project_id=gitlab-org/gitlab" --form "name=gitlab"
 ```
 
@@ -98,7 +98,7 @@ Example response:
 Removes a project aliases. Responds with a 204 when project alias
 exists, 404 when it doesn't:
 
-```
+```plaintext
 DELETE /project_aliases/:name
 ```
 
@@ -106,6 +106,6 @@ DELETE /project_aliases/:name
 |-----------|--------|----------|-----------------------|
 | `name`    | string | yes      | The name of the alias |
 
-```
+```shell
 curl --request DELETE --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/project_aliases/gitlab"
 ```

doc/api/project_badges.md

@@ -16,7 +16,7 @@ Badges support placeholders that will be replaced in real time in both the link
 
 Gets a list of a project's badges and its group badges.
 
-```
+```plaintext
 GET /projects/:id/badges
 ```
 
@@ -58,7 +58,7 @@ Example response:
 
 Gets a badge of a project.
 
-```
+```plaintext
 GET /projects/:id/badges/:badge_id
 ```
 
@@ -88,7 +88,7 @@ Example response:
 
 Adds a badge to a project.
 
-```
+```plaintext
 POST /projects/:id/badges
 ```
 
@@ -119,7 +119,7 @@ Example response:
 
 Updates a badge of a project.
 
-```
+```plaintext
 PUT /projects/:id/badges/:badge_id
 ```
 
@@ -151,7 +151,7 @@ Example response:
 
 Removes a badge from a project. Only project's badges will be removed by using this endpoint.
 
-```
+```plaintext
 DELETE /projects/:id/badges/:badge_id
 ```
 
@@ -168,7 +168,7 @@ curl --request DELETE --header "PRIVATE-TOKEN: <your_access_token>" https://gitl
 
 Returns how the `link_url` and `image_url` final URLs would be after resolving the placeholder interpolation.
 
-```
+```plaintext
 GET /projects/:id/badges/render
 ```