Remove extra whitespaces in docs

Removes all the extra whitespaces at end of lines,
inside tags, and removes extra newlines

28 files changed, 67 insertions, 77 deletions

diff --git a/doc/administration/job_traces.md b/doc/administration/job_traces.md
index aa9d87562a3..6556614723d 100644
--- a/doc/administration/job_traces.md
+++ b/doc/administration/job_traces.md
@@ -72,7 +72,7 @@ To archive those legacy job traces, please follow the instruction below.
     ```
 
     After you executed this task, GitLab instance queues up Sidekiq jobs (asynchronous processes)
-    for migrating job trace files from local storage to object storage. 
+    for migrating job trace files from local storage to object storage.
     It could take time to complete the all migration jobs. You can check the progress by the following command
 
     ```bash
diff --git a/doc/administration/packages.md b/doc/administration/packages.md
index cc7d76d61f6..1da8de12188 100644
--- a/doc/administration/packages.md
+++ b/doc/administration/packages.md
@@ -11,7 +11,7 @@ The Packages feature allows GitLab to act as a repository for the following:
 | [Maven Repository](../user/project/packages/maven_repository.md) | The GitLab Maven Repository enables every project in GitLab to have its own space to store [Maven](https://maven.apache.org/) packages. | 11.3+ |
 | [NPM Registry](../user/project/packages/npm_registry.md)   | The GitLab NPM Registry enables every project in GitLab to have its own space to store [NPM](https://www.npmjs.com/) packages. | 11.7+ |
 
-Don't you see your package management system supported yet? 
+Don't you see your package management system supported yet?
 Please consider contributing
 to GitLab. This [development documentation](../development/packages.md) will guide you through the process.
 
diff --git a/doc/administration/pseudonymizer.md b/doc/administration/pseudonymizer.md
index faa565118ce..3278409d4b5 100644
--- a/doc/administration/pseudonymizer.md
+++ b/doc/administration/pseudonymizer.md
@@ -22,9 +22,9 @@ To configure the pseudonymizer, you need to:
 
 - Provide a manifest file that describes which fields should be included or
   pseudonymized ([example `manifest.yml` file](https://gitlab.com/gitlab-org/gitlab-ee/tree/master/config/pseudonymizer.yml)).
-  A default manifest is provided with the GitLab installation. Using a relative file path will be resolved from the Rails root. 
+  A default manifest is provided with the GitLab installation. Using a relative file path will be resolved from the Rails root.
   Alternatively, you can use an absolute file path.
-- Use an object storage and specify the connection parameters in the `pseudonymizer.upload.connection` configuration option. 
+- Use an object storage and specify the connection parameters in the `pseudonymizer.upload.connection` configuration option.
 
 **For Omnibus installations:**
 
diff --git a/doc/administration/repository_storage_types.md b/doc/administration/repository_storage_types.md
index 834b41b3a2c..f4cb89c84a4 100644
--- a/doc/administration/repository_storage_types.md
+++ b/doc/administration/repository_storage_types.md
@@ -6,19 +6,19 @@ Two different storage layouts can be used
 to store the repositories on disk and their characteristics.
 
 GitLab can be configured to use one or multiple repository shard locations
-that can be: 
+that can be:
 
 - Mounted to the local disk
 - Exposed as an NFS shared volume
 - Acessed via [gitaly] on its own machine.
 
 In GitLab, this is configured in `/etc/gitlab/gitlab.rb` by the `git_data_dirs({})`
-configuration hash. The storage layouts discussed here will apply to any shard 
+configuration hash. The storage layouts discussed here will apply to any shard
 defined in it.
 
 The `default` repository shard that is available in any installations
 that haven't customized it, points to the local folder: `/var/opt/gitlab/git-data`.
-Anything discussed below is expected to be part of that folder. 
+Anything discussed below is expected to be part of that folder.
 
 ## Legacy Storage
 
@@ -108,7 +108,7 @@ question.
 ### How to migrate to Hashed Storage
 
 To start a migration, enable Hashed Storage for new projects:
- 
+
 1. Go to **Admin > Settings > Repository** and expand the **Repository Storage** section.
 2. Select the **Use hashed storage paths for newly created and renamed projects** checkbox.
 
@@ -129,7 +129,7 @@ an Omnibus Gitlab installation:
 sudo gitlab-rake gitlab:storage:migrate_to_hashed ID_FROM=50 ID_TO=100
 ```
 
-Check the [documentation][rake/migrate-to-hashed] for additional information and instructions for 
+Check the [documentation][rake/migrate-to-hashed] for additional information and instructions for
 source-based installation.
 
 #### Rollback
@@ -140,12 +140,12 @@ projects:
 1. Go to **Admin > Settings > Repository** and expand the **Repository Storage** section.
 2. Uncheck the **Use hashed storage paths for newly created and renamed projects** checkbox.
 
-To schedule a complete rollback, see the 
+To schedule a complete rollback, see the
 [rake task documentation for storage rollback](raketasks/storage.md#rollback-from-hashed-storage-to-legacy-storage) for instructions.
 
 The rollback task also supports specifying a range of Project IDs. Here is an example
 of limiting the rollout to Project IDs 50 to 100, in an Omnibus Gitlab installation:
- 
+
 ```bash
 sudo gitlab-rake gitlab:storage:rollback_to_legacy ID_FROM=50 ID_TO=100
 ```
diff --git a/doc/api/boards.md b/doc/api/boards.md
index 926a0be1d8b..08ec1d832df 100644
--- a/doc/api/boards.md
+++ b/doc/api/boards.md
@@ -229,7 +229,6 @@ PUT /projects/:id/boards/:board_id
 | `labels`            | string         | no       | Comma-separated list of label names which the board should be scoped to |
 | `weight`            | integer        | no       | The weight range from 0 to 9, to which the board should be scoped to |
 
-
 ```bash
 curl --request PUT --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/projects/5/boards/1?name=new_name&milestone_id=43&assignee_id=1&labels=Doing&weight=4
 ```
diff --git a/doc/api/deploy_keys.md b/doc/api/deploy_keys.md
index 1d7523fcc3d..41f6ab436e8 100644
--- a/doc/api/deploy_keys.md
+++ b/doc/api/deploy_keys.md
@@ -19,13 +19,13 @@ Example response:
   {
     "id": 1,
     "title": "Public key",
-    "key": "ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAIEAiPWx6WM4lhHNedGfBpPJNPpZ7yKu+dnn1SJejgt4596k6YjzGGphH2TUxwKzxcKDKKezwkpfnxPkSMkuEspGRt/aZZ9wa++Oi7Qkr8prgHc4soW6NUlfDzpvZK2H5E7eQaSeP3SAwGmQKUFHCddNaP0L+hM7zhFNzjFvpaMgJw0=",    
+    "key": "ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAIEAiPWx6WM4lhHNedGfBpPJNPpZ7yKu+dnn1SJejgt4596k6YjzGGphH2TUxwKzxcKDKKezwkpfnxPkSMkuEspGRt/aZZ9wa++Oi7Qkr8prgHc4soW6NUlfDzpvZK2H5E7eQaSeP3SAwGmQKUFHCddNaP0L+hM7zhFNzjFvpaMgJw0=",
     "created_at": "2013-10-02T10:12:29Z"
   },
   {
     "id": 3,
     "title": "Another Public key",
-    "key": "ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAIEAiPWx6WM4lhHNedGfBpPJNPpZ7yKu+dnn1SJejgt4596k6YjzGGphH2TUxwKzxcKDKKezwkpfnxPkSMkuEspGRt/aZZ9wa++Oi7Qkr8prgHc4soW6NUlfDzpvZK2H5E7eQaSeP3SAwGmQKUFHCddNaP0L+hM7zhFNzjFvpaMgJw0=",    
+    "key": "ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAIEAiPWx6WM4lhHNedGfBpPJNPpZ7yKu+dnn1SJejgt4596k6YjzGGphH2TUxwKzxcKDKKezwkpfnxPkSMkuEspGRt/aZZ9wa++Oi7Qkr8prgHc4soW6NUlfDzpvZK2H5E7eQaSeP3SAwGmQKUFHCddNaP0L+hM7zhFNzjFvpaMgJw0=",
     "created_at": "2013-10-02T11:12:29Z"
   }
 ]
diff --git a/doc/api/epics.md b/doc/api/epics.md
index 563f6feb546..d05eb0a8804 100644
--- a/doc/api/epics.md
+++ b/doc/api/epics.md
@@ -302,7 +302,7 @@ POST /groups/:id/epics/:epic_iid/todo
 | Attribute   | Type    | Required | Description                          |
 |-------------|---------|----------|--------------------------------------|
 | `id`        | integer/string | yes   | The ID or [URL-encoded path of the group](README.md#namespaced-path-encoding) owned by the authenticated user  |
-| `epic_iid ` | integer | yes          | The internal ID of a group's epic |
+| `epic_iid` | integer | yes          | The internal ID of a group's epic |
 
 ```bash
 curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/groups/1/epics/5/todo
diff --git a/doc/api/issue_links.md b/doc/api/issue_links.md
index 31776568b8e..280431fa87c 100644
--- a/doc/api/issue_links.md
+++ b/doc/api/issue_links.md
@@ -67,7 +67,6 @@ POST /projects/:id/issues/:issue_iid/links
 | `target_project_id` | integer/string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) of a target project  |
 | `target_issue_iid` | integer/string | yes      | The internal ID of a target project's issue |
 
-
 ```json
 {
   "source_issue" : {
@@ -141,14 +140,12 @@ Deletes an issue link, thus removes the two-way relationship.
 DELETE /projects/:id/issues/:issue_iid/links/:issue_link_id
 ```
 
-
 | 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  |
 | `issue_iid` | integer | yes      | The internal ID of a project's issue |
 | `issue_link_id` | integer/string | yes      | The ID of an issue relationship |
 
-
 ```json
 {
   "source_issue" : {
diff --git a/doc/api/issues.md b/doc/api/issues.md
index 6952426c322..23126a05b66 100644
--- a/doc/api/issues.md
+++ b/doc/api/issues.md
@@ -57,7 +57,7 @@ GET /issues?confidential=true
 | `created_before`    | datetime         | no         | Return issues created on or before the given time                                                                                                   |
 | `updated_after`     | datetime         | no         | Return issues updated on or after the given time                                                                                                    |
 | `updated_before`    | datetime         | no         | Return issues updated on or before the given time                                                                                                   |
-| `confidential `     | Boolean          | no         | Filter confidential or public issues.                                                                                                               |
+| `confidential`     | Boolean          | no         | Filter confidential or public issues.                                                                                                               |
 
 ```bash
 curl --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/issues
@@ -206,7 +206,7 @@ GET /groups/:id/issues?confidential=true
 | `created_before`    | datetime         | no         | Return issues created on or before the given time                                                                             |
 | `updated_after`     | datetime         | no         | Return issues updated on or after the given time                                                                              |
 | `updated_before`    | datetime         | no         | Return issues updated on or before the given time                                                                             |
-| `confidential `     | Boolean          | no         | Filter confidential or public issues.                                                                                         |
+| `confidential`     | Boolean          | no         | Filter confidential or public issues.                                                                                         |
 
 ```bash
 curl --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/groups/4/issues
@@ -355,7 +355,7 @@ GET /projects/:id/issues?confidential=true
 | `created_before`    | datetime         | no         | Return issues created on or before the given time                                                                             |
 | `updated_after`     | datetime         | no         | Return issues updated on or after the given time                                                                              |
 | `updated_before`    | datetime         | no         | Return issues updated on or before the given time                                                                             |
-| `confidential `     | Boolean          | no         | Filter confidential or public issues.                                                                                         |
+| `confidential`     | Boolean          | no         | Filter confidential or public issues.                                                                                         |
 
 
 ```bash
diff --git a/doc/api/issues_statistics.md b/doc/api/issues_statistics.md
index 58a32e879d7..d7edb296be2 100644
--- a/doc/api/issues_statistics.md
+++ b/doc/api/issues_statistics.md
@@ -43,7 +43,7 @@ GET /issues_statistics?confidential=true
 | `created_before`    | datetime         | no         | Return issues created on or before the given time                                                                                                   |
 | `updated_after`     | datetime         | no         | Return issues updated on or after the given time                                                                                                    |
 | `updated_before`    | datetime         | no         | Return issues updated on or before the given time                                                                                                   |
-| `confidential `     | Boolean          | no         | Filter confidential or public issues.                                                                                                               |
+| `confidential`     | Boolean          | no         | Filter confidential or public issues.                                                                                                               |
 
 ```bash
 curl --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/issues_statistics
@@ -99,7 +99,7 @@ GET /groups/:id/issues_statistics?confidential=true
 | `created_before`    | datetime         | no         | Return issues created on or before the given time                                                                             |
 | `updated_after`     | datetime         | no         | Return issues updated on or after the given time                                                                              |
 | `updated_before`    | datetime         | no         | Return issues updated on or before the given time                                                                             |
-| `confidential `     | Boolean          | no         | Filter confidential or public issues.                                                                                         |
+| `confidential`     | Boolean          | no         | Filter confidential or public issues.                                                                                         |
 
 ```bash
 curl --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/groups/4/issues_statistics
@@ -155,8 +155,7 @@ GET /projects/:id/issues_statistics?confidential=true
 | `created_before`    | datetime         | no         | Return issues created on or before the given time                                                                             |
 | `updated_after`     | datetime         | no         | Return issues updated on or after the given time                                                                              |
 | `updated_before`    | datetime         | no         | Return issues updated on or before the given time                                                                             |
-| `confidential `     | Boolean          | no         | Filter confidential or public issues.                                                                                         |
-
+| `confidential`     | Boolean          | no         | Filter confidential or public issues.                                                                                         |
 
 ```bash
 curl --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/projects/4/issues_statistics
diff --git a/doc/api/jobs.md b/doc/api/jobs.md
index bb8df6187a9..1add5f432ac 100644
--- a/doc/api/jobs.md
+++ b/doc/api/jobs.md
@@ -485,7 +485,7 @@ Parameters
 | Attribute       | Type           | Required | Description                                                                                                      |
 |-----------------|----------------|----------|------------------------------------------------------------------------------------------------------------------|
 | `id`            | integer/string | yes      | ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) owned by the authenticated user. |
-| `job_id  `      | integer        | yes      | The unique job identifier.                                                                                       |
+| `job_id`        | integer        | yes      | The unique job identifier.                                                                                       |
 | `artifact_path` | string         | yes      | Path to a file inside the artifacts archive.                                                                     |
 
 Example request:
@@ -782,7 +782,6 @@ DELETE /projects/:id/jobs/:job_id/artifacts
 | `id`      | integer/string | yes      | ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) |
 | `job_id`  | integer        | yes      | ID of a job.                                                                |
 
-
 Example request:
 
 ```sh
diff --git a/doc/api/license.md b/doc/api/license.md
index 02754d63bd4..12f1d03d576 100644
--- a/doc/api/license.md
+++ b/doc/api/license.md
@@ -131,7 +131,6 @@ Returns:
 - `201 Created` if the license is successfully added.
 - `400 Bad Request` if the license couldn't be added, with an error message explaining the reason.
 
-
 ## Delete a license
 
 ```
diff --git a/doc/api/managed_licenses.md b/doc/api/managed_licenses.md
index 9521be5abac..1af7567626f 100644
--- a/doc/api/managed_licenses.md
+++ b/doc/api/managed_licenses.md
@@ -105,7 +105,7 @@ DELETE /projects/:id/managed_licenses/:managed_license_id
 curl --request DELETE --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/projects/1/managed_licenses/4"
 ```
 
-When successful, it replies with an HTTP 204 response. 
+When successful, it replies with an HTTP 204 response.
 
 ## Edit an existing managed license
 
diff --git a/doc/api/merge_request_approvals.md b/doc/api/merge_request_approvals.md
index 504ce56f569..c211916464a 100644
--- a/doc/api/merge_request_approvals.md
+++ b/doc/api/merge_request_approvals.md
@@ -178,7 +178,6 @@ PUT /projects/:id/approvers
 }
 ```
 
-
 ## Merge Request-level MR approvals
 
 Configuration for approvals on a specific Merge Request. Must be authenticated for all endpoints.
@@ -250,7 +249,6 @@ POST /projects/:id/merge_requests/:merge_request_iid/approvals
 | `merge_request_iid`  | integer | yes      | The IID of MR                              |
 | `approvals_required` | integer | yes      | Approvals required before MR can be merged |
 
-
 ```json
 {
   "id": 5,
diff --git a/doc/api/oauth2.md b/doc/api/oauth2.md
index dfe62554852..76e3a0fa1a4 100644
--- a/doc/api/oauth2.md
+++ b/doc/api/oauth2.md
@@ -192,7 +192,7 @@ access_token = client.password.get_token('user@example.com', 'secret')
 puts access_token.token
 ```
 
-##  Access GitLab API with `access token`
+## Access GitLab API with `access 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:
diff --git a/doc/api/packages.md b/doc/api/packages.md
index 1a795c0cfa7..ca90771b085 100644
--- a/doc/api/packages.md
+++ b/doc/api/packages.md
@@ -76,7 +76,7 @@ Example response:
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9305) in GitLab 11.8.
 
-Get a list of package files of a single package. 
+Get a list of package files of a single package.
 
 ```
 GET /projects/:id/packages/:package_id/package_files
diff --git a/doc/api/project_badges.md b/doc/api/project_badges.md
index 3a7b3d8975e..1c382232837 100644
--- a/doc/api/project_badges.md
+++ b/doc/api/project_badges.md
@@ -91,7 +91,7 @@ POST /projects/:id/badges
 
 | 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 |
 | `link_url` | string         | yes | URL of the badge link |
 | `image_url` | string | yes | URL of the badge image |
 
diff --git a/doc/api/project_statistics.md b/doc/api/project_statistics.md
index 34d73abfcbf..2732fa47fa0 100644
--- a/doc/api/project_statistics.md
+++ b/doc/api/project_statistics.md
@@ -14,7 +14,7 @@ GET /projects/:id/statistics
 
 | Attribute  | Type   | Required | Description |
 | ---------- | ------ | -------- | ----------- |
-| `id `      | integer / string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) |
+| `id`      | integer / string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) |
 
 Example response:
 
diff --git a/doc/api/project_templates.md b/doc/api/project_templates.md
index 69d61b3974b..cc932e3ef58 100644
--- a/doc/api/project_templates.md
+++ b/doc/api/project_templates.md
@@ -27,7 +27,7 @@ GET /projects/:id/templates/:type
 
 | Attribute  | Type   | Required | Description |
 | ---------- | ------ | -------- | ----------- |
-| `id `      | integer / string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) |
+| `id`      | integer / string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) |
 | `type`     | string | yes| The type `(dockerfiles|gitignores|gitlab_ci_ymls|licenses)` of the template |
 
 Example response (licenses):
@@ -93,7 +93,7 @@ GET /projects/:id/templates/:type/:key
 
 | Attribute  | Type   | Required | Description |
 | ---------- | ------ | -------- | ----------- |
-| `id `      | integer / string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) |
+| `id`      | integer / string | yes      | The ID or [URL-encoded path of the project](README.md#namespaced-path-encoding) |
 | `type`     | string | yes| The type `(dockerfiles|gitignores|gitlab_ci_ymls|licenses)` of the template |
 | `key`      | string | yes      | The key of the template, as obtained from the collection endpoint |
 | `project`  | string | no       | The project name to use when expanding placeholders in the template. Only affects licenses |
diff --git a/doc/api/scim.md b/doc/api/scim.md
index 46498465261..ece7f56e394 100644
--- a/doc/api/scim.md
+++ b/doc/api/scim.md
@@ -6,7 +6,7 @@ The SCIM API implements the [the RFC7644 protocol](https://tools.ietf.org/html/r
 
 NOTE: **Note:**
 [Group SSO](../user/group/saml_sso/index.md) and the feature
-flag `:group_scim` must be enabled for the group. For more information, see [SCIM setup documentation](../user/group/saml_sso/scim_setup.md#requirements). 
+flag `:group_scim` must be enabled for the group. For more information, see [SCIM setup documentation](../user/group/saml_sso/scim_setup.md#requirements).
 
 ## Get a list of SAML users
 
diff --git a/doc/customization/system_header_and_footer_messages.md b/doc/customization/system_header_and_footer_messages.md
index 7eee79abc77..15830be4e8a 100644
--- a/doc/customization/system_header_and_footer_messages.md
+++ b/doc/customization/system_header_and_footer_messages.md
@@ -8,8 +8,8 @@ Navigate to the **Admin** area and go to the **Appearance** page.
 Under **System header and footer** insert your header message and/or footer message.
 Both background and font color of the header and footer are customizable.
 
-You can also apply the header and footer messages to gitlab emails, 
-by checking the **Enable header and footer in emails** checkbox. 
+You can also apply the header and footer messages to gitlab emails,
+by checking the **Enable header and footer in emails** checkbox.
 Note that color settings will only be applied within the app interface and not to emails
 
 ![appearance](system_header_and_footer_messages/appearance.png)
diff --git a/doc/development/api_styleguide.md b/doc/development/api_styleguide.md
index 4fc38a460f8..0866d3baeeb 100644
--- a/doc/development/api_styleguide.md
+++ b/doc/development/api_styleguide.md
@@ -53,7 +53,7 @@ allowed.
 
 ### Exclude params from parent namespaces!
 
-> By default `declared(params) `includes parameters that were defined in all
+> By default `declared(params)`includes parameters that were defined in all
 parent namespaces.
 
 – <https://github.com/ruby-grape/grape#include-parent-namespaces>
diff --git a/doc/development/code_comments.md b/doc/development/code_comments.md
index 36962eb46d4..827a610efa2 100644
--- a/doc/development/code_comments.md
+++ b/doc/development/code_comments.md
@@ -1,11 +1,11 @@
 # Code comments
 
-Whenever you add comment to the code that is expected to be addressed at any time 
-in future, please create a technical debt issue for it. Then put a link to it 
+Whenever you add comment to the code that is expected to be addressed at any time
+in future, please create a technical debt issue for it. Then put a link to it
 to the code comment you've created. This will allow other developers to quickly
 check if a comment is still relevant and what needs to be done to address it.
 
-Examples: 
+Examples:
 
 ```rb
 # Deprecated scope until code_owner column has been migrated to rule_type.
diff --git a/doc/development/emails.md b/doc/development/emails.md
index 8baf343b133..1fd4139c91e 100644
--- a/doc/development/emails.md
+++ b/doc/development/emails.md
@@ -76,7 +76,7 @@ See the [Rails guides] for more info.
 
 ## Email namespace
 
-As of GitLab 11.7, we support a new format for email handler addresses.  This was done to 
+As of GitLab 11.7, we support a new format for email handler addresses.  This was done to
 support catch-all mailboxes.
 
 If you need to implement a feature which requires a new email handler, follow these rules
diff --git a/doc/development/licensed_feature_availability.md b/doc/development/licensed_feature_availability.md
index 7d0a6f6acda..80ec7b8c0cf 100644
--- a/doc/development/licensed_feature_availability.md
+++ b/doc/development/licensed_feature_availability.md
@@ -1,18 +1,18 @@
 # Licensed feature availability **(STARTER)**
 
-As of GitLab 9.4, we've been supporting a simplified version of licensed 
-feature availability checks via `ee/app/models/license.rb`, both for 
+As of GitLab 9.4, we've been supporting a simplified version of licensed
+feature availability checks via `ee/app/models/license.rb`, both for
 on-premise or GitLab.com plans and features.
 
 ## Restricting features scoped by namespaces or projects
 
 GitLab.com plans are persisted on user groups and namespaces, therefore, if you're adding a
-feature such as [Related issues](../user/project/issues/related_issues.md) or 
-[Service desk](../user/project/service_desk.md), 
+feature such as [Related issues](../user/project/issues/related_issues.md) or
+[Service desk](../user/project/service_desk.md),
 it should be restricted on namespace scope.
 
-1. Add the feature symbol on `EES_FEATURES`, `EEP_FEATURES` or `EEU_FEATURES` constants in 
-  `ee/app/models/license.rb`. Note on `ee/app/models/ee/namespace.rb` that _Bronze_ GitLab.com 
+1. Add the feature symbol on `EES_FEATURES`, `EEP_FEATURES` or `EEU_FEATURES` constants in
+  `ee/app/models/license.rb`. Note on `ee/app/models/ee/namespace.rb` that _Bronze_ GitLab.com
   features maps to on-premise _EES_, _Silver_ to _EEP_ and _Gold_ to _EEU_.
 2. Check using:
 
@@ -22,12 +22,12 @@ project.feature_available?(:feature_symbol)
 
 ## Restricting global features (instance)
 
-However, for features such as [Geo](../administration/geo/replication/index.md) and 
-[Load balancing](../administration/database_load_balancing.md), which cannot be restricted 
-to only a subset of projects or namespaces, the check will be made directly in 
+However, for features such as [Geo](../administration/geo/replication/index.md) and
+[Load balancing](../administration/database_load_balancing.md), which cannot be restricted
+to only a subset of projects or namespaces, the check will be made directly in
 the instance license.
 
-1. Add the feature symbol on `EES_FEATURES`, `EEP_FEATURES` or `EEU_FEATURES` constants in 
+1. Add the feature symbol on `EES_FEATURES`, `EEP_FEATURES` or `EEU_FEATURES` constants in
   `ee/app/models/license.rb`.
 2. Add the same feature symbol to `GLOBAL_FEATURES`
 3. Check using:
diff --git a/doc/development/newlines_styleguide.md b/doc/development/newlines_styleguide.md
index 5f7210020b6..a13adc2f13e 100644
--- a/doc/development/newlines_styleguide.md
+++ b/doc/development/newlines_styleguide.md
@@ -11,7 +11,7 @@ def method
 
   issue.save
 
-  render json: issue 
+  render json: issue
 end
 ```
 
@@ -21,7 +21,7 @@ def method
   issue = Issue.new
   issue.save
 
-  render json: issue 
+  render json: issue
 end
 ```
 
diff --git a/doc/development/packages.md b/doc/development/packages.md
index 418efd9eef9..08aa0b08525 100644
--- a/doc/development/packages.md
+++ b/doc/development/packages.md
@@ -5,11 +5,11 @@ This document will guide you through adding another [package management system](
 See already supported package types in [Packages documentation](../administration/packages.md)
 
 Since GitLab packages' UI is pretty generic, it is possible to add new
-package system support by solely backend changes. This guide is superficial and does 
-not cover the way the code should be written. However, you can find a good example 
-by looking at existing merge requests with Maven and NPM support: 
+package system support by solely backend changes. This guide is superficial and does
+not cover the way the code should be written. However, you can find a good example
+by looking at existing merge requests with Maven and NPM support:
 
-- [NPM registry support](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8673). 
+- [NPM registry support](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8673).
 - [Maven repository](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/6607).
 - [Instance level endpoint for Maven repository](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8757)
 
@@ -17,44 +17,44 @@ by looking at existing merge requests with Maven and NPM support:
 
 The existing database model requires the following:
 
-- Every package belongs to a project. 
+- Every package belongs to a project.
 - Every package file belongs to a package.
 - A package can have one or more package files.
 - The package model is based on storing information about the package and its version.
 
 ## API endpoints
 
-Package systems work with GitLab via API. For example `ee/lib/api/npm_packages.rb` 
-implements API endpoints to work with NPM clients. So, the first thing to do is to 
-add a new `ee/lib/api/your_name_packages.rb` file with API endpoints that are 
-necessary to make the package system client to work. Usually that means having 
-endpoints like: 
+Package systems work with GitLab via API. For example `ee/lib/api/npm_packages.rb`
+implements API endpoints to work with NPM clients. So, the first thing to do is to
+add a new `ee/lib/api/your_name_packages.rb` file with API endpoints that are
+necessary to make the package system client to work. Usually that means having
+endpoints like:
 
 - GET package information.
 - GET package file content.
 - PUT upload package.
 
 Since the packages belong to a project, it's expected to have project-level endpoint
-for uploading and downloading them. For example: 
+for uploading and downloading them. For example:
 
 ```
 GET https://gitlab.com/api/v4/projects/<your_project_id>/packages/npm/
 PUT https://gitlab.com/api/v4/projects/<your_project_id>/packages/npm/
 ```
 
-Group-level and instance-level endpoints are good to have but are optional. 
+Group-level and instance-level endpoints are good to have but are optional.
 
 NOTE: **Note:**
-To avoid name conflict for instance-level endpoints we use 
+To avoid name conflict for instance-level endpoints we use
 [the package naming convention](../user/project/packages/npm_registry.md#package-naming-convention)
 
 ## Configuration
 
-GitLab has a `packages` section in its configuration file (`gitlab.rb`). 
-It applies to all package systems supported by GitLab. Usually you don't need 
-to add anything there. 
+GitLab has a `packages` section in its configuration file (`gitlab.rb`).
+It applies to all package systems supported by GitLab. Usually you don't need
+to add anything there.
 
-Packages can be configured to use object storage, therefore your code must support it. 
+Packages can be configured to use object storage, therefore your code must support it.
 
 ## Database
 
@@ -63,6 +63,6 @@ Every time you upload a new package, you can either create a new record of `Pack
 or add files to existing record. `PackageFile` should be able to store all file-related
 information like the file `name`, `side`, `sha1`, etc.
 
-If there is specific data necessary to be stored for only one package system support, 
-consider creating a separate metadata model. See `packages_maven_metadata` table 
+If there is specific data necessary to be stored for only one package system support,
+consider creating a separate metadata model. See `packages_maven_metadata` table
 and `Packages::MavenMetadatum` model as example for package specific data.
diff --git a/doc/development/understanding_explain_plans.md b/doc/development/understanding_explain_plans.md
index bfbb7be70e3..11aafd7b639 100644
--- a/doc/development/understanding_explain_plans.md
+++ b/doc/development/understanding_explain_plans.md
@@ -654,7 +654,6 @@ and related tools such as:
 - <https://explain.depesz.com/>
 - <http://tatiyants.com/postgres-query-plan-visualization/>
 
-
 ## Producing query plans
 
 There are a few ways to get the output of a query plan. Of course you