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Adjust documentation of permissions

## What does this MR do?
This MR improves the documentation of the permissions by mentioning that internal projects do not enforce the Guest role.
## Are there points in the code the reviewer needs to double check?
No code was touched - only the documentation was adjusted.
## Why was this MR needed?
Without this adjustment it might not be clear how you can set up an internal project to be pullable by everyone whilst having the issue tracker and labels managed by permitted people only.
## What are the relevant issue numbers?
#13679 

See merge request !2925

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Fix issue milestone filter spec

See merge request !2990

Strip leading and trailing spaces in URL validator

_Originally opened at !2914 by @evuez._

It makes URLs in webhooks valid even if they contain leading and/or trailing spaces.

Spaces are hard to notice in input fields, this helps users by accepting leading and trailing spaces in webhooks URLs.

Fixes #13652

See merge request !2939

Refactor Repository Caching

Related issue: https://gitlab.com/gitlab-org/gitlab-ce/issues/13515

See merge request !2936

Fix avatar stretching by providing a cropping feature

Originally by @nesk at https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/2773

Fixes #7959

See merge request !2951

Created helper class to hide content in issue sidebar when collapsed

![Screen_Shot_2016-02-25_at_10.38.39](/uploads/ca49cc230edf7e71b7726e905f523092/Screen_Shot_2016-02-25_at_10.38.39.png)

Closes #13764

See merge request !2968

Add builds URL to gitlab-ci script

Add builds URL to gitlab-ci script

Related to: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/2681

See merge request !2962

Refactor html/css for lists and improve help UI page

* dry lists html/css removing a lot of style duplicates
* fix snippets list to match common style
* fix extra bottom margin for groups list
* improve help page ui so it looks clean

Fixes #11873 

See merge request !2977

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fix syntax error in autosave coffeescript.

According to http://coffeescript.org/#try , `catch` needs to have an argument.

Otherwise, `Error: Parse error on line 19: Unexpected 'INDENT'` error is raised when converting to JS by coffee-script.

Fixes gitlab-org/gitlab-ce#3302


See merge request !2985

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Move "I should see Crowd login form" feature to a view spec

We were doing all kinds of code gymnastics to "enable" Crowd in the
feature spec and this would sometimes cause a transient failure.

Really what it's testing is if the Crowd login form shows when Crowd's
enabled, so this is much better suited to a view spec.

See merge request !2963

# Conflicts:
#	.gitlab-ci.yml

Reformats confusing '[named here]' section for 3rd party code attribution

Weird formatting originally. Which of the following is the proper format for attribution?

1. Submitted on behalf of a third-party: [David Alexander]
1. Submitted on behalf of a third-party: [[] David Alexander]
1. Submitted on behalf of a third-party: [] David Alexander
1. Submitted on behalf of a third-party: [[ David Alexander ]]
1. ... _etc._

With this change, it allows for either of the following formats:

1. Submitted on behalf of a third-party: [David Alexander]
1. Submitted on behalf of a third-party: David Alexander

See merge request !2861

Add instructions for pushing tags as well as branches

Current instructions will push the svn branches but not tags  - add missing line to tags


See merge request !2778

Does not create a Todo when commenting on commit or project snippet

Closes #13733

See merge request !2964

Fix order in Gemfile.lock

See merge request !2969

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This is only needed when calling the "expire_cache" method as the other
expiration methods don't depend on Git data.

Closes #13764