Change location and refactor issue closing pattern documentation

Split into user and administrator docs:

- administration/issue_closing_pattern.md
- user/project/issues/automatic_issue_closing.md

[ci skip]

8 files changed, 114 insertions, 44 deletions

diff --git a/doc/README.md b/doc/README.md
index 254394eb63e..dd0eb97489e 100644
--- a/doc/README.md
+++ b/doc/README.md
@@ -29,9 +29,9 @@
 - [Install](install/README.md) Requirements, directory structures and installation from source.
 - [Restart GitLab](administration/restart_gitlab.md) Learn how to restart GitLab and its components.
 - [Integration](integration/README.md) How to integrate with systems such as JIRA, Redmine, Twitter.
-- [Issue closing](customization/issue_closing.md) Customize how to close an issue from commit messages.
+- [Issue closing pattern](administration/issue_closing_pattern.md) Customize how to close an issue from commit messages.
 - [Koding](administration/integration/koding.md) Set up Koding to use with GitLab.
-- [Libravatar](customization/libravatar.md) Use Libravatar for user avatars.
+- [Libravatar](customization/libravatar.md) Use Libravatar instead of Gravatar for user avatars.
 - [Log system](administration/logs.md) Log system.
 - [Environment Variables](administration/environment_variables.md) to configure GitLab.
 - [Operations](operations/README.md) Keeping GitLab up and running.
diff --git a/doc/administration/issue_closing_pattern.md b/doc/administration/issue_closing_pattern.md
new file mode 100644
index 00000000000..28e1fd4e12e
--- /dev/null
+++ b/doc/administration/issue_closing_pattern.md
@@ -0,0 +1,49 @@
+# Issue closing pattern
+
+>**Note:**
+This is the administration documentation.
+There is a separate [user documentation] on issue closing pattern.
+
+When a commit or merge request resolves one or more issues, it is possible to
+automatically have these issues closed when the commit or merge request lands
+in the project's default branch.
+
+## Change the issue closing pattern
+
+In order to change the pattern you need to have access to the server that GitLab
+is installed on.
+
+The default pattern can be located in [gitlab.yml.example] under the
+"Automatic issue closing" section.
+
+> **Tip:**
+You are advised to use http://rubular.com to test the issue closing pattern.
+Because Rubular doesn't understand `%{issue_ref}`, you can replace this by
+`#\d+` when testing your patterns, which matches only local issue references like `#123`.
+
+**For Omnibus installations**
+
+1. Open `/etc/gitlab/gitlab.rb` with your editor.
+1. Change the value of `gitlab_rails['issue_closing_pattern']` to a regular
+   expression of your liking:
+
+    ```ruby
+    gitlab_rails['issue_closing_pattern'] = "((?:[Cc]los(?:e[sd]|ing)|[Ff]ix(?:e[sd]|ing)?) +(?:(?:issues? +)?%{issue_ref}(?:(?:, *| +and +)?))+)"
+    ```
+1. [Reconfigure] GitLab for the changes to take effect.
+
+**For installations from source**
+
+1. Open `gitlab.yml` with your editor.
+1. Change the value of `issue_closing_pattern`:
+
+    ```yaml
+    issue_closing_pattern: "((?:[Cc]los(?:e[sd]|ing)|[Ff]ix(?:e[sd]|ing)?) +(?:(?:issues? +)?%{issue_ref}(?:(?:, *| +and +)?))+)"
+    ```
+
+1. [Restart] GitLab for the changes to take effect.
+
+[gitlab.yml.example]: https://gitlab.com/gitlab-org/gitlab-ce/blob/master/config/gitlab.yml.example
+[reconfigure]: restart_gitlab.md#omnibus-gitlab-reconfigure
+[restart]: restart_gitlab.md#installations-from-source
+[user documentation]: ../user/project/issues/automatic_issue_closing.md
diff --git a/doc/customization/issue_closing.md b/doc/customization/issue_closing.md
index 4620bb2dcde..31164ccd465 100644
--- a/doc/customization/issue_closing.md
+++ b/doc/customization/issue_closing.md
@@ -1,39 +1,4 @@
-# Issue closing pattern
+This document was split into:
 
-When a commit or merge request resolves one or more issues, it is possible to automatically have these issues closed when the commit or merge request lands in the project's default branch.
-
-If a commit message or merge request description contains a sentence matching the regular expression below, all issues referenced from
-the matched text will be closed. This happens when the commit is pushed to a project's default branch, or when a commit or merge request is merged into there.
-
-When not specified, the default `issue_closing_pattern` as shown below will be used:
-
-```bash
-((?:[Cc]los(?:e[sd]?|ing)|[Ff]ix(?:e[sd]|ing)?|[Rr]esolv(?:e[sd]?|ing))(:?) +(?:(?:issues? +)?%{issue_ref}(?:(?:, *| +and +)?)|([A-Z][A-Z0-9_]+-\d+))+)
-```
-
-Here, `%{issue_ref}` is a complex regular expression defined inside GitLab, that matches a reference to a local issue (`#123`), cross-project issue (`group/project#123`) or a link to an issue (`https://gitlab.example.com/group/project/issues/123`).
-
-For example:
-
-```
-git commit -m "Awesome commit message (Fix #20, Fixes #21 and Closes group/otherproject#22). This commit is also related to #17 and fixes #18, #19 and https://gitlab.example.com/group/otherproject/issues/23."
-```
-
-will close `#18`, `#19`, `#20`, and `#21` in the project this commit is pushed to, as well as `#22` and `#23` in group/otherproject. `#17` won't be closed as it does not match the pattern. It also works with multiline commit messages.
-
-Tip: you can test this closing pattern at [http://rubular.com][1]. Use this site
-to test your own patterns.
-Because Rubular doesn't understand `%{issue_ref}`, you can replace this by `#\d+` in testing, which matches only local issue references like `#123`.
-
-## Change the pattern
-
-For Omnibus installs you can change the default pattern in `/etc/gitlab/gitlab.rb`:
-
-```
-issue_closing_pattern: '((?:[Cc]los(?:e[sd]|ing)|[Ff]ix(?:e[sd]|ing)?) +(?:(?:issues? +)?%{issue_ref}(?:(?:, *| +and +)?))+)'
-```
-
-For manual installs you can customize the pattern in [gitlab.yml][0] using the `issue_closing_pattern` key.
-
-[0]: https://gitlab.com/gitlab-org/gitlab-ce/blob/master/config/gitlab.yml.example
-[1]: http://rubular.com/r/Xmbexed1OJ
+- [administration/issue_closing_pattern.md](../administration/issue_closing_pattern.md).
+- [user/project/issues/automatic_issue_closing](../user/project/issues/automatic_issue_closing.md).
diff --git a/doc/gitlab-basics/create-issue.md b/doc/gitlab-basics/create-issue.md
index 5221d85b661..da9a165b8f5 100644
--- a/doc/gitlab-basics/create-issue.md
+++ b/doc/gitlab-basics/create-issue.md
@@ -1,6 +1,6 @@
 # How to create an Issue in GitLab
 
-The Issue Tracker is a good place to add things that need to be improved or solved in a project.  
+The Issue Tracker is a good place to add things that need to be improved or solved in a project.
 
 To create an Issue, sign in to GitLab.
 
@@ -24,4 +24,4 @@ You may assign the Issue to a user, add a milestone and add labels (they are all
 
 ![Submit new issue](basicsimages/submit_new_issue.png)
 
-Your Issue will now be added to the Issue Tracker and will be ready to be reviewed. You can comment on it and mention the people involved. You can also link Issues to the Merge Requests where the Issues are solved. To do this, you can use an [Issue closing pattern](http://docs.gitlab.com/ce/customization/issue_closing.html).
+Your Issue will now be added to the Issue Tracker and will be ready to be reviewed. You can comment on it and mention the people involved. You can also link Issues to the Merge Requests where the Issues are solved. To do this, you can use an [Issue closing pattern](../user/project/issues/automatic_issue_closing.md).
diff --git a/doc/intro/README.md b/doc/intro/README.md
index 71fef50ceb4..1790b2b761f 100644
--- a/doc/intro/README.md
+++ b/doc/intro/README.md
@@ -22,7 +22,7 @@ Create merge requests and review code.
 
 - [Fork a project and contribute to it](../workflow/forking_workflow.md)
 - [Create a new merge request](../gitlab-basics/add-merge-request.md)
-- [Automatically close issues from merge requests](../customization/issue_closing.md)
+- [Automatically close issues from merge requests](../user/project/issues/automatic_issue_closing.md)
 - [Automatically merge when your builds succeed](../user/project/merge_requests/merge_when_build_succeeds.md)
 - [Revert any commit](../user/project/merge_requests/revert_changes.md)
 - [Cherry-pick any commit](../user/project/merge_requests/cherry_pick_changes.md)
diff --git a/doc/user/project/issues/automatic_issue_closing.md b/doc/user/project/issues/automatic_issue_closing.md
new file mode 100644
index 00000000000..d6f3a7d5555
--- /dev/null
+++ b/doc/user/project/issues/automatic_issue_closing.md
@@ -0,0 +1,55 @@
+# Automatic issue closing
+
+>**Note:**
+This is the user docs. In order to change the default issue closing pattern,
+follow the steps in the [administration docs].
+
+When a commit or merge request resolves one or more issues, it is possible to
+automatically have these issues closed when the commit or merge request lands
+in the project's default branch.
+
+If a commit message or merge request description contains a sentence matching
+a certain regular expression, all issues referenced from the matched text will
+be closed. This happens when the commit is pushed to a project's **default**
+branch, or when a commit or merge request is merged into it.
+
+## Default closing pattern value
+
+When not specified, the default issue closing pattern as shown below will be
+used:
+
+```bash
+((?:[Cc]los(?:e[sd]?|ing)|[Ff]ix(?:e[sd]|ing)?|[Rr]esolv(?:e[sd]?|ing))(:?) +(?:(?:issues? +)?%{issue_ref}(?:(?:, *| +and +)?)|([A-Z][A-Z0-9_]+-\d+))+)
+```
+
+Note that `%{issue_ref}` is a complex regular expression defined inside GitLab's
+source code that can match a reference to 1) a local issue (`#123`),
+2) a cross-project issue (`group/project#123`) or 3) a link to an issue
+(`https://gitlab.example.com/group/project/issues/123`).
+
+---
+
+This translates to the following keywords:
+
+- Close, Closes, Closed, Closing, close, closes, closed, closing
+- Fix, Fixes, Fixed, Fixing, fix, fixes, fixed, fixing
+- Resolve, Resolves, Resolved, Resolving, resolve, resolves, resolved, resolving
+
+---
+
+For example the following commit message:
+
+```
+Awesome commit message
+
+Fix #20, Fixes #21 and Closes group/otherproject#22.
+This commit is also related to #17 and fixes #18, #19
+and https://gitlab.example.com/group/otherproject/issues/23.
+```
+
+will close `#18`, `#19`, `#20`, and `#21` in the project this commit is pushed
+to, as well as `#22` and `#23` in group/otherproject. `#17` won't be closed as
+it does not match the pattern. It works with multi-line commit messages as well
+as one-liners when used with `git commit -m`.
+
+[administration docs]: ../../../administration/issue_closing_pattern.md
diff --git a/doc/user/project/repository/web_editor.md b/doc/user/project/repository/web_editor.md
index 7c041d019bb..993c6bfb7e9 100644
--- a/doc/user/project/repository/web_editor.md
+++ b/doc/user/project/repository/web_editor.md
@@ -172,4 +172,4 @@ you commit the changes you will be taken to a new merge request form.
 
 ![New file button](basicsimages/file_button.png)
 [ce-2808]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/2808
-[issue closing pattern]: ../customization/issue_closing.md
+[issue closing pattern]: ../user/project/issues/automatic_issue_closing.md
diff --git a/doc/workflow/README.md b/doc/workflow/README.md
index e8ecb8d8fb4..2d9bfbc0629 100644
--- a/doc/workflow/README.md
+++ b/doc/workflow/README.md
@@ -1,5 +1,6 @@
 # Workflow
 
+- [Automatic issue closing](../user/project/issues/automatic_issue_closing.md)
 - [Change your time zone](timezone.md)
 - [Cycle Analytics](../user/project/cycle_analytics.md)
 - [Description templates](../user/project/description_templates.md)