Raise sentence spacing rule to error

Also fix violations of the rule.

doc/.linting/vale/styles/gitlab/SentenceSpacing.yml

 ---
-# Checks the presence of more than one space between sentences or clauses.
+# Check for the following in common content scenarios:
+#
+# - No spaces.
+# - More than one space.
 #
 # For a list of all options, see https://errata-ai.github.io/vale/styles/
 extends: existence
-message: "'%s' should have one space between sentences or clauses."
+message: '"%s" must contain one and only one space.'
 link: https://docs.gitlab.com/ee/development/documentation/styleguide.html#punctuation
-level: warning
+level: error
 nonword: true
 tokens:
   - '[a-z][.?!,][A-Z]'
-  - '[.?!,] {2,}[\w]'
+  - '[\w.?!,\(\)\-":] {2,}[\w.?!,\(\)\-":]'

doc/administration/auth/how_to_configure_ldap_gitlab_ce/index.md

@@ -34,7 +34,7 @@ We won't cover the installation and configuration of Windows Server or Active Di
 
 - Install Windows Server 2012 - (`technet.microsoft.com`) - [Installing Windows Server 2012](https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-R2-and-2012/jj134246(v=ws.11))
 
-- Install Active Directory Domain Services (AD DS) (`technet.microsoft.com`)- [Install Active Directory Domain Services](https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/deploy/install-active-directory-domain-services--level-100-#BKMK_PS)
+- Install Active Directory Domain Services (AD DS) (`technet.microsoft.com`) - [Install Active Directory Domain Services](https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/deploy/install-active-directory-domain-services--level-100-#BKMK_PS)
 
 > **Shortcut:** You can quickly install AD DS via PowerShell using
 `Install-WindowsFeature AD-Domain-Services -IncludeManagementTools`

doc/administration/geo/replication/troubleshooting.md

@@ -215,7 +215,7 @@ sudo gitlab-rake gitlab:geo:check
    - Ensure that you entered the `external_url` or `gitlab_rails['geo_node_name']` when adding the secondary node in the admin are of the **primary** node.
    - Prior to GitLab 12.4, edit the secondary node in the Admin Area of the **primary** node and ensure that there is a trailing `/` in the `Name` field.
 
-1. Check returns Exception: PG::UndefinedTable: ERROR:  relation "geo_nodes" does not exist
+1. Check returns `Exception: PG::UndefinedTable: ERROR:  relation "geo_nodes" does not exist`
 
    ```plaintext
    Checking Geo ...
@@ -252,7 +252,7 @@ sudo gitlab-rake gitlab:geo:check
 The following sections outline troubleshooting steps for fixing replication
 errors.
 
-### Message: "ERROR:  replication slots can only be used if max_replication_slots > 0"?
+### Message: `ERROR:  replication slots can only be used if max_replication_slots > 0`?
 
 This means that the `max_replication_slots` PostgreSQL variable needs to
 be set on the **primary** database. In GitLab 9.4, we have made this setting
@@ -263,7 +263,7 @@ Be sure to restart PostgreSQL for this to take
 effect. See the [PostgreSQL replication
 setup][database-pg-replication] guide for more details.
 
-### Message: "FATAL:  could not start WAL streaming: ERROR:  replication slot "geo_secondary_my_domain_com" does not exist"?
+### Message: `FATAL:  could not start WAL streaming: ERROR:  replication slot "geo_secondary_my_domain_com" does not exist`?
 
 This occurs when PostgreSQL does not have a replication slot for the
 **secondary** node by that name.

doc/api/settings.md

@@ -239,7 +239,7 @@ are listed in the descriptions of the relevant settings.
 | `external_auth_client_key_pass`          | string           | no                                   | Passphrase to use for the private key when authenticating with the external service this is encrypted when stored |
 | `external_auth_client_key`               | string           | required by: `external_auth_client_cert` | Private key for the certificate when authentication is required for the external authorization service, this is encrypted when stored |
 | `external_authorization_service_default_label` | string     | required by: `external_authorization_service_enabled` | The default classification label to use when requesting authorization and no classification label has been specified on the project |
-| `external_authorization_service_enabled` | boolean          | no                                   | (**If enabled, requires:** `external_authorization_service_default_label`, `external_authorization_service_timeout` and `external_authorization_service_url` )  Enable using an external authorization service for accessing projects |
+| `external_authorization_service_enabled` | boolean          | no                                   | (**If enabled, requires:** `external_authorization_service_default_label`, `external_authorization_service_timeout` and `external_authorization_service_url`) Enable using an external authorization service for accessing projects |
 | `external_authorization_service_timeout` | float            | required by: `external_authorization_service_enabled` | The timeout after which an authorization request is aborted, in seconds. When a request times out, access is denied to the user. (min: 0.001, max: 10, step: 0.001) |
 | `external_authorization_service_url`     | string           | required by: `external_authorization_service_enabled` | URL to which authorization requests will be directed |
 | `file_template_project_id`               | integer          | no                                   | **(PREMIUM)** The ID of a project to load custom file templates from |