Revisions part 1: no gerunds in subheadings

Start the cleanup of this page by taking the gerunds out of subheads.
This can cause links to break, so I'm just changing the subheads and
their crosslinks in this merge request. Edits for tone and style can
be done in a separate merge request.

doc/development/wikis.md

@@ -19,7 +19,7 @@ Wikis use Git repositories as storage backend, and can be accessed through:
 
 - The [Web UI](../user/project/wiki/index.md)
 - The [REST API](../api/wikis.md)
-- [Git itself](../user/project/wiki/#adding-and-editing-wiki-pages-locally)
+- [Git itself](../user/project/wiki/index.md#create-or-edit-wiki-pages-locally)
 
 [Introduced](https://gitlab.com/groups/gitlab-org/-/epics/2214) in GitLab 13.5, wikis are also available
 for groups, in addition to projects.

doc/user/gitlab_com/index.md

@@ -50,7 +50,7 @@ Projects can be backed up in their entirety by exporting them either [through th
 
 With exports, be sure to take note of [what is and is not](../project/settings/import_export.md#exported-contents), included in a project export.
 
-Since GitLab is built on Git, you can back up **just** the repository of a project by [cloning](../../gitlab-basics/start-using-git.md#clone-a-repository) it to another machine. Similarly, if you need to back up just the wiki of a repository it can also be cloned and all files uploaded to that wiki are included [if they were uploaded after 2020-08-22](../project/wiki/index.md#creating-a-new-wiki-page).
+Since GitLab is built on Git, you can back up **just** the repository of a project by [cloning](../../gitlab-basics/start-using-git.md#clone-a-repository) it to another machine. Similarly, if you need to back up just the wiki of a repository it can also be cloned and all files uploaded to that wiki are included [if they were uploaded after 2020-08-22](../project/wiki/index.md#create-a-new-wiki-page).
 
 ## Alternative SSH port
 

doc/user/project/wiki/index.md

@@ -16,13 +16,13 @@ repository, but you do want to keep it in the same project where your code
 resides.
 
 You can create Wiki pages in the web interface or
-[locally using Git](#adding-and-editing-wiki-pages-locally) since every Wiki is
+[locally using Git](#create-or-edit-wiki-pages-locally) since every Wiki is
 a separate Git repository.
 
 [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/13195) in [GitLab Premium](https://about.gitlab.com/pricing/) 13.5,
 **group wikis** became available. Their usage is similar to project wikis, with a few [limitations](../../group/index.md#group-wikis).
 
-## First time creating the Home page
+## Create the wiki home page
 
 The first time you visit a Wiki, you are directed to create the Home page.
 The Home page is necessary to be created because it serves as the landing page
@@ -32,7 +32,7 @@ message.
 
 ![New home page](img/wiki_create_home_page.png)
 
-## Creating a new wiki page
+## Create a new wiki page
 
 NOTE:
 Requires Developer [permissions](../../permissions.md).
@@ -60,7 +60,7 @@ When you're ready, select **Create page** and the new page is created.
 
 ![New page](img/wiki_create_new_page.png)
 
-### Attachment storage
+### Store attachments for wiki pages
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/issues/33475) in GitLab 11.3.
 
@@ -94,7 +94,7 @@ Please note that:
 - Non-ASCII characters take up more than one byte.
 - It's still possible to create files and directories exceeding those limits locally through Git, but this might break on other people's machines.
 
-## Editing a wiki page
+## Edit a wiki page
 
 You need Developer [permissions](../../permissions.md) or higher to edit a wiki page.
 To do so:
@@ -103,12 +103,12 @@ To do so:
 1. Edit the content.
 1. Select **Save changes**.
 
-### Adding a table of contents
+### Create a table of contents
 
 To generate a table of contents from the headings in a Wiki page, use the `[[_TOC_]]` tag.
 For an example, see [Table of contents](../../markdown.md#table-of-contents).
 
-## Deleting a wiki page
+## Delete a wiki page
 
 You need Maintainer [permissions](../../permissions.md) or higher to delete a wiki page.
 To do so:
@@ -117,7 +117,7 @@ To do so:
 1. Select **Delete page**.
 1. Confirm the deletion.
 
-## Moving a wiki page
+## Move a wiki page
 
 You need Developer [permissions](../../permissions.md) or higher to move a wiki page.
 To do so:
@@ -139,7 +139,7 @@ If you want to do the opposite:
 1. Change the **Title** from `about` to `company/about`.
 1. Select **Save changes**.
 
-## Viewing a list of all created wiki pages
+## View list of all wiki pages
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/17673/) in GitLab 13.5, wiki pages are displayed as a nested tree in the sidebar and pages overview.
 
@@ -151,7 +151,7 @@ found. The list is ordered alphabetically.
 If you have many pages, not all are listed in the sidebar. Select
 **View All Pages** to see all of them.
 
-## Viewing the history of a wiki page
+## View history of a wiki page
 
 The changes of a wiki page over time are recorded in the wiki's Git repository,
 and you can view them by selecting **Page history**.
@@ -163,7 +163,7 @@ number in the **Page version** column.
 
 ![Wiki page history](img/wiki_page_history.png)
 
-### Viewing the changes between page versions
+### View changes between page versions
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/15242) in GitLab 13.2.
 
@@ -175,7 +175,7 @@ Similar to versioned diff file views, you can see the changes made in a given Wi
 
    ![Wiki page changes](img/wiki_page_diffs_v13_2.png)
 
-## Wiki activity records
+## Track wiki events
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/14902) in **GitLab 12.10.**
 > - Git events were [introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/216014) in **GitLab 13.0.**
@@ -186,7 +186,7 @@ displayed on the [user profile](../../profile/index.md#access-your-user-profile)
 [group](../../group/index.md#view-group-activity),
 and [project](../working_with_projects.md#project-activity) activity pages.
 
-## Adding and editing wiki pages locally
+## Create or edit wiki pages locally
 
 Since wikis are based on Git repositories, you can clone them locally and edit
 them like you would do with every other Git repository.
@@ -202,7 +202,7 @@ otherwise they don't display when pushed to GitLab:
 - AsciiDoc extensions: `.adoc`, `.ad`, `.asciidoc`.
 - Other markup extensions: `.textile`, `.rdoc`, `.org`, `.creole`, `.wiki`, `.mediawiki`, `.rst`.
 
-## Customizing sidebar
+## Customize sidebar
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/23109) in GitLab 13.8, the sidebar can be customized by selecting the **Edit sidebar** button.
 
@@ -225,3 +225,7 @@ Example for `_sidebar` (using Markdown format):
 ```
 
 Support for displaying a generated table of contents with a custom side navigation is planned.
+
+## Resources
+
+- [Group wikis](../../group/index.md#group-wikis)