Merge branch 'docs/fix-webhooks-headings' into 'master'

Small refactor of webhooks docs

See merge request !7872

doc/web_hooks/web_hooks.md

 # Webhooks
-_**Note:**
-Starting from GitLab 8.5:_
-- _the `repository` key is deprecated in favor of the `project` key_
-- _the `project.ssh_url` key is deprecated in favor of the `project.git_ssh_url` key_
-- _the `project.http_url` key is deprecated in favor of the `project.git_http_url` key_
-Project webhooks allow you to trigger an URL if new code is pushed or a new issue is created.
-You can configure webhooks to listen for specific events like pushes, issues or merge requests. GitLab will send a POST request with data to the webhook URL.
-
-Webhooks can be used to update an external issue tracker, trigger CI builds, update a backup mirror, or even deploy to your production server.
+>**Note:**
+Starting from GitLab 8.5:
+- the `repository` key is deprecated in favor of the `project` key
+- the `project.ssh_url` key is deprecated in favor of the `project.git_ssh_url` key
+- the `project.http_url` key is deprecated in favor of the `project.git_http_url` key
+Project webhooks allow you to trigger a URL if for example new code is pushed or
+a new issue is created. You can configure webhooks to listen for specific events
+like pushes, issues or merge requests. GitLab will send a POST request with data
+to the webhook URL.
+Webhooks can be used to update an external issue tracker, trigger CI builds,
+update a backup mirror, or even deploy to your production server.
+Navigate to the webhooks page by choosing **Webhooks** from your project's
+settings which can be found under the wheel icon in the upper right corner.
 ## Webhook endpoint tips
@@ -26,21 +30,27 @@ GitLab webhooks keep in mind the following things:
     you are writing a low-level hook this is important to remember.
 -   GitLab ignores the HTTP status code returned by your endpoint.
-## Secret Token
-If you specify a secret token, it will be sent with the hook request in the `X-Gitlab-Token` HTTP header. Your webhook endpoint can check that to verify that the request is legitimate.
-## SSL Verification
+## Secret token
+If you specify a secret token, it will be sent with the hook request in the
+`X-Gitlab-Token` HTTP header. Your webhook endpoint can check that to verify
+that the request is legitimate.
+## SSL verification
 By default, the SSL certificate of the webhook endpoint is verified based on
-an internal list of Certificate Authorities,
-which means the certificate cannot be self-signed.
+an internal list of Certificate Authorities, which means the certificate cannot
+be self-signed.
 You can turn this off in the webhook settings in your GitLab projects.
 ![SSL Verification](ssl.png)
-## Push events
+## Events
+
+Below are described the supported events.
+
+### Push events
 Triggered when you push to the repository except when pushing tags.
@@ -121,7 +131,7 @@ X-Gitlab-Event: Push Hook
 }
 ```
-## Tag events
+### Tag events
 Triggered when you create (or delete) tags to the repository.
@@ -174,7 +184,7 @@ X-Gitlab-Event: Tag Push Hook
 }
 ```
-## Issues events
+### Issues events
 Triggered when a new issue is created or an existing issue was updated/closed/reopened.
@@ -240,7 +250,7 @@ X-Gitlab-Event: Issue Hook
   }
 }
 ```
-## Comment events
+### Comment events
 Triggered when a new comment is made on commits, merge requests, issues, and code snippets.
 The note data will be stored in `object_attributes` (e.g. `note`, `noteable_type`). The
@@ -253,7 +263,7 @@ Valid target types:
 3. `issue`
 4. `snippet`
-### Comment on commit
+#### Comment on commit
 **Request header**:
@@ -332,7 +342,7 @@ X-Gitlab-Event: Note Hook
 }
 ```
-### Comment on merge request
+#### Comment on merge request
 **Request header**:
@@ -459,7 +469,7 @@ X-Gitlab-Event: Note Hook
 }
 ```
-### Comment on issue
+#### Comment on issue
 **Request header**:
@@ -534,7 +544,7 @@ X-Gitlab-Event: Note Hook
 }
 ```
-### Comment on code snippet
+#### Comment on code snippet
 **Request header**:
@@ -607,7 +617,7 @@ X-Gitlab-Event: Note Hook
 }
 ```
-## Merge request events
+### Merge request events
 Triggered when a new merge request is created, an existing merge request was updated/merged/closed or a commit is added in the source branch.
@@ -699,7 +709,7 @@ X-Gitlab-Event: Merge Request Hook
 }
 ```
-## Wiki Page events
+### Wiki Page events
 Triggered when a wiki page is created or edited.
@@ -737,9 +747,9 @@ X-Gitlab-Event: Wiki Page Hook
   },
   "wiki": {
     "web_url": "http://example.com/root/awesome-project/wikis/home",
-    "git_ssh_url": "git@example.com:root/awesome-project.wiki.git", 
-    "git_http_url": "http://example.com/root/awesome-project.wiki.git", 
-    "path_with_namespace": "root/awesome-project.wiki", 
+    "git_ssh_url": "git@example.com:root/awesome-project.wiki.git",
+    "git_http_url": "http://example.com/root/awesome-project.wiki.git",
+    "path_with_namespace": "root/awesome-project.wiki",
     "default_branch": "master"
   },
   "object_attributes": {
@@ -754,7 +764,7 @@ X-Gitlab-Event: Wiki Page Hook
 }
 ```
-## Pipeline events
+### Pipeline events
 Triggered on status change of Pipeline.
@@ -922,8 +932,7 @@ X-Gitlab-Event: Pipeline Hook
 }
 ```
-
-## Build events
+### Build events
 Triggered on status change of a Build.
@@ -935,7 +944,7 @@ X-Gitlab-Event: Build Hook
 **Request Body**:
-```
+```json
 {
   "object_kind": "build",
   "ref": "gitlab-script-trigger",
@@ -980,12 +989,13 @@ X-Gitlab-Event: Build Hook
 }
 ```
-#### Example webhook receiver
+## Example webhook receiver
 If you want to see GitLab's webhooks in action for testing purposes you can use
-a simple echo script running in a console session.
-Save the following file as `print_http_body.rb`.
+a simple echo script running in a console session. For the following script to
+work you need to have Ruby installed.
+Save the following file as `print_http_body.rb`:
 ```ruby
 require 'webrick'
@@ -1005,7 +1015,8 @@ Pick an unused port (e.g. 8000) and start the script: `ruby print_http_body.rb
 8000`.  Then add your server as a webhook receiver in GitLab as
 `http://my.host:8000/`.
-When you press 'Test Hook' in GitLab, you should see something like this in the console.
+When you press 'Test Hook' in GitLab, you should see something like this in the
+console:
 ```
 {"before":"077a85dd266e6f3573ef7e9ef8ce3343ad659c4e","after":"95cd4a99e93bc4bbabacfa2cd10e6725b1403c60",<SNIP>}